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Finding the Fourth Proportional to 28,136, 42,139.38 and 14,052.80

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Solution

The fourth proportional to 28,136, 42,139.38 and 14,052.80 is: 21,046.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,136 : 42,139.38 = 14,052.80 : x
  2. Step 2: Convert to fraction form
    28,136/42,139.38 = 14,052.80/x
  3. Step 3: Cross multiply
    28,136x = 42,139.38 × 14,052.80
  4. Step 4: Simplify right side
    28,136x = 592,176,279.26
  5. Step 5: Solve for x
    x = 592,176,279.26/28,136
  6. Step 6: Final answer
    x = 21,046.92

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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.