Home / 20,580.28-28,400.76-11,148.88

Finding the Fourth Proportional to 20,580.28, 28,400.76 and 11,148.88

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Solution

The fourth proportional to 20,580.28, 28,400.76 and 11,148.88 is: 15,385.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,580.28 : 28,400.76 = 11,148.88 : x
  2. Step 2: Convert to fraction form
    20,580.28/28,400.76 = 11,148.88/x
  3. Step 3: Cross multiply
    20,580.28x = 28,400.76 × 11,148.88
  4. Step 4: Simplify right side
    20,580.28x = 316,636,665.15
  5. Step 5: Solve for x
    x = 316,636,665.15/20,580.28
  6. Step 6: Final answer
    x = 15,385.44

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.