Home / 15,128.13-20,876.45-8,413.74

Finding the Fourth Proportional to 15,128.13, 20,876.45 and 8,413.74

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Solution

The fourth proportional to 15,128.13, 20,876.45 and 8,413.74 is: 11,610.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,128.13 : 20,876.45 = 8,413.74 : x
  2. Step 2: Convert to fraction form
    15,128.13/20,876.45 = 8,413.74/x
  3. Step 3: Cross multiply
    15,128.13x = 20,876.45 × 8,413.74
  4. Step 4: Simplify right side
    15,128.13x = 175,648,918.04
  5. Step 5: Solve for x
    x = 175,648,918.04/15,128.13
  6. Step 6: Final answer
    x = 11,610.75

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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.