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Finding the Fourth Proportional to 14,087.61, 21,141 and 7,518.51

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Solution

The fourth proportional to 14,087.61, 21,141 and 7,518.51 is: 11,282.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,087.61 : 21,141 = 7,518.51 : x
  2. Step 2: Convert to fraction form
    14,087.61/21,141 = 7,518.51/x
  3. Step 3: Cross multiply
    14,087.61x = 21,141 × 7,518.51
  4. Step 4: Simplify right side
    14,087.61x = 158,948,819.91
  5. Step 5: Solve for x
    x = 158,948,819.91/14,087.61
  6. Step 6: Final answer
    x = 11,282.88

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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.