Home / 20,582.81-28,404.31-11,151.38

Finding the Fourth Proportional to 20,582.81, 28,404.31 and 11,151.38

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Solution

The fourth proportional to 20,582.81, 28,404.31 and 11,151.38 is: 15,388.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,582.81 : 28,404.31 = 11,151.38 : x
  2. Step 2: Convert to fraction form
    20,582.81/28,404.31 = 11,151.38/x
  3. Step 3: Cross multiply
    20,582.81x = 28,404.31 × 11,151.38
  4. Step 4: Simplify right side
    20,582.81x = 316,747,084.55
  5. Step 5: Solve for x
    x = 316,747,084.55/20,582.81
  6. Step 6: Final answer
    x = 15,388.91

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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.