Home / 18,675.73-28,031.18-12,440.13

Finding the Fourth Proportional to 18,675.73, 28,031.18 and 12,440.13

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Solution

The fourth proportional to 18,675.73, 28,031.18 and 12,440.13 is: 18,671.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,675.73 : 28,031.18 = 12,440.13 : x
  2. Step 2: Convert to fraction form
    18,675.73/28,031.18 = 12,440.13/x
  3. Step 3: Cross multiply
    18,675.73x = 28,031.18 × 12,440.13
  4. Step 4: Simplify right side
    18,675.73x = 348,711,523.25
  5. Step 5: Solve for x
    x = 348,711,523.25/18,675.73
  6. Step 6: Final answer
    x = 18,671.91

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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.