Home / 15,139.86-20,892.36-8,425.77

Finding the Fourth Proportional to 15,139.86, 20,892.36 and 8,425.77

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Solution

The fourth proportional to 15,139.86, 20,892.36 and 8,425.77 is: 11,627.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,139.86 : 20,892.36 = 8,425.77 : x
  2. Step 2: Convert to fraction form
    15,139.86/20,892.36 = 8,425.77/x
  3. Step 3: Cross multiply
    15,139.86x = 20,892.36 × 8,425.77
  4. Step 4: Simplify right side
    15,139.86x = 176,034,220.12
  5. Step 5: Solve for x
    x = 176,034,220.12/15,139.86
  6. Step 6: Final answer
    x = 11,627.20

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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.