Home / 12,457,413.20-18,686,119.80-7,649,512.40

Finding the Fourth Proportional to 12,457,413.20, 18,686,119.80 and 7,649,512.40

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Solution

The fourth proportional to 12,457,413.20, 18,686,119.80 and 7,649,512.40 is: 11,474,268.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,457,413.20 : 18,686,119.80 = 7,649,512.40 : x
  2. Step 2: Convert to fraction form
    12,457,413.20/18,686,119.80 = 7,649,512.40/x
  3. Step 3: Cross multiply
    12,457,413.20x = 18,686,119.80 × 7,649,512.40
  4. Step 4: Simplify right side
    12,457,413.20x = 142,939,705,117,985.53
  5. Step 5: Solve for x
    x = 142,939,705,117,985.53/12,457,413.20
  6. Step 6: Final answer
    x = 11,474,268.60

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.