Home / 20,929.27-28,882.31-11,369.08

Finding the Fourth Proportional to 20,929.27, 28,882.31 and 11,369.08

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Solution

The fourth proportional to 20,929.27, 28,882.31 and 11,369.08 is: 15,689.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,929.27 : 28,882.31 = 11,369.08 : x
  2. Step 2: Convert to fraction form
    20,929.27/28,882.31 = 11,369.08/x
  3. Step 3: Cross multiply
    20,929.27x = 28,882.31 × 11,369.08
  4. Step 4: Simplify right side
    20,929.27x = 328,365,163.92
  5. Step 5: Solve for x
    x = 328,365,163.92/20,929.27
  6. Step 6: Final answer
    x = 15,689.28

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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.