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Finding the Fourth Proportional to 19,886.80, 29,839.80 and 14,030.80

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Solution

The fourth proportional to 19,886.80, 29,839.80 and 14,030.80 is: 21,052.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,886.80 : 29,839.80 = 14,030.80 : x
  2. Step 2: Convert to fraction form
    19,886.80/29,839.80 = 14,030.80/x
  3. Step 3: Cross multiply
    19,886.80x = 29,839.80 × 14,030.80
  4. Step 4: Simplify right side
    19,886.80x = 418,676,265.84
  5. Step 5: Solve for x
    x = 418,676,265.84/19,886.80
  6. Step 6: Final answer
    x = 21,052.97

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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.