Home / 10,666.20-16,001.19-5,115.81

Finding the Fourth Proportional to 10,666.20, 16,001.19 and 5,115.81

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Solution

The fourth proportional to 10,666.20, 16,001.19 and 5,115.81 is: 7,674.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,666.20 : 16,001.19 = 5,115.81 : x
  2. Step 2: Convert to fraction form
    10,666.20/16,001.19 = 5,115.81/x
  3. Step 3: Cross multiply
    10,666.20x = 16,001.19 × 5,115.81
  4. Step 4: Simplify right side
    10,666.20x = 81,859,047.81
  5. Step 5: Solve for x
    x = 81,859,047.81/10,666.20
  6. Step 6: Final answer
    x = 7,674.62

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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.