Home / 20,929.10-28,882.13-11,368.94

Finding the Fourth Proportional to 20,929.10, 28,882.13 and 11,368.94

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Solution

The fourth proportional to 20,929.10, 28,882.13 and 11,368.94 is: 15,689.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,929.10 : 28,882.13 = 11,368.94 : x
  2. Step 2: Convert to fraction form
    20,929.10/28,882.13 = 11,368.94/x
  3. Step 3: Cross multiply
    20,929.10x = 28,882.13 × 11,368.94
  4. Step 4: Simplify right side
    20,929.10x = 328,359,001.79
  5. Step 5: Solve for x
    x = 328,359,001.79/20,929.10
  6. Step 6: Final answer
    x = 15,689.12

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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.