Home / 15,711.90-23,569.20-5,178.78

Finding the Fourth Proportional to 15,711.90, 23,569.20 and 5,178.78

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Solution

The fourth proportional to 15,711.90, 23,569.20 and 5,178.78 is: 7,768.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,711.90 : 23,569.20 = 5,178.78 : x
  2. Step 2: Convert to fraction form
    15,711.90/23,569.20 = 5,178.78/x
  3. Step 3: Cross multiply
    15,711.90x = 23,569.20 × 5,178.78
  4. Step 4: Simplify right side
    15,711.90x = 122,059,701.58
  5. Step 5: Solve for x
    x = 122,059,701.58/15,711.90
  6. Step 6: Final answer
    x = 7,768.61

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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.