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Finding the Fourth Proportional to 28,154.47, 42,243.47 and 12,351.35

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Solution

The fourth proportional to 28,154.47, 42,243.47 and 12,351.35 is: 18,532.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,154.47 : 42,243.47 = 12,351.35 : x
  2. Step 2: Convert to fraction form
    28,154.47/42,243.47 = 12,351.35/x
  3. Step 3: Cross multiply
    28,154.47x = 42,243.47 × 12,351.35
  4. Step 4: Simplify right side
    28,154.47x = 521,763,702.85
  5. Step 5: Solve for x
    x = 521,763,702.85/28,154.47
  6. Step 6: Final answer
    x = 18,532.18

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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.