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Finding the Fourth Proportional to 28,497, 42,748.92 and 11,868.30

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Solution

The fourth proportional to 28,497, 42,748.92 and 11,868.30 is: 17,803.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,497 : 42,748.92 = 11,868.30 : x
  2. Step 2: Convert to fraction form
    28,497/42,748.92 = 11,868.30/x
  3. Step 3: Cross multiply
    28,497x = 42,748.92 × 11,868.30
  4. Step 4: Simplify right side
    28,497x = 507,357,007.24
  5. Step 5: Solve for x
    x = 507,357,007.24/28,497
  6. Step 6: Final answer
    x = 17,803.87

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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.