Home / 18,871.17-28,306.75-8,470.77

Finding the Fourth Proportional to 18,871.17, 28,306.75 and 8,470.77

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Solution

The fourth proportional to 18,871.17, 28,306.75 and 8,470.77 is: 12,706.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,871.17 : 28,306.75 = 8,470.77 : x
  2. Step 2: Convert to fraction form
    18,871.17/28,306.75 = 8,470.77/x
  3. Step 3: Cross multiply
    18,871.17x = 28,306.75 × 8,470.77
  4. Step 4: Simplify right side
    18,871.17x = 239,779,968.70
  5. Step 5: Solve for x
    x = 239,779,968.70/18,871.17
  6. Step 6: Final answer
    x = 12,706.15

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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.