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Finding the Fourth Proportional to 28,137, 42,140.88 and 14,053.80

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Solution

The fourth proportional to 28,137, 42,140.88 and 14,053.80 is: 21,048.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,137 : 42,140.88 = 14,053.80 : x
  2. Step 2: Convert to fraction form
    28,137/42,140.88 = 14,053.80/x
  3. Step 3: Cross multiply
    28,137x = 42,140.88 × 14,053.80
  4. Step 4: Simplify right side
    28,137x = 592,239,499.34
  5. Step 5: Solve for x
    x = 592,239,499.34/28,137
  6. Step 6: Final answer
    x = 21,048.42

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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.