Home / 10,929.20-15,062.28-7,939.80

Finding the Fourth Proportional to 10,929.20, 15,062.28 and 7,939.80

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Solution

The fourth proportional to 10,929.20, 15,062.28 and 7,939.80 is: 10,942.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,929.20 : 15,062.28 = 7,939.80 : x
  2. Step 2: Convert to fraction form
    10,929.20/15,062.28 = 7,939.80/x
  3. Step 3: Cross multiply
    10,929.20x = 15,062.28 × 7,939.80
  4. Step 4: Simplify right side
    10,929.20x = 119,591,490.74
  5. Step 5: Solve for x
    x = 119,591,490.74/10,929.20
  6. Step 6: Final answer
    x = 10,942.38

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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.