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Finding the Fourth Proportional to 18,937.52, 28,411.50 and 16,871.80

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Solution

The fourth proportional to 18,937.52, 28,411.50 and 16,871.80 is: 25,312.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,937.52 : 28,411.50 = 16,871.80 : x
  2. Step 2: Convert to fraction form
    18,937.52/28,411.50 = 16,871.80/x
  3. Step 3: Cross multiply
    18,937.52x = 28,411.50 × 16,871.80
  4. Step 4: Simplify right side
    18,937.52x = 479,353,145.70
  5. Step 5: Solve for x
    x = 479,353,145.70/18,937.52
  6. Step 6: Final answer
    x = 25,312.35

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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.