Home / 15,487.12-21,372.28-8,413.60

Finding the Fourth Proportional to 15,487.12, 21,372.28 and 8,413.60

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Solution

The fourth proportional to 15,487.12, 21,372.28 and 8,413.60 is: 11,610.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,487.12 : 21,372.28 = 8,413.60 : x
  2. Step 2: Convert to fraction form
    15,487.12/21,372.28 = 8,413.60/x
  3. Step 3: Cross multiply
    15,487.12x = 21,372.28 × 8,413.60
  4. Step 4: Simplify right side
    15,487.12x = 179,817,815.01
  5. Step 5: Solve for x
    x = 179,817,815.01/15,487.12
  6. Step 6: Final answer
    x = 11,610.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.