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Finding the Fourth Proportional to 18,753.30, 28,125 and 5,602.53

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Solution

The fourth proportional to 18,753.30, 28,125 and 5,602.53 is: 8,402.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,753.30 : 28,125 = 5,602.53 : x
  2. Step 2: Convert to fraction form
    18,753.30/28,125 = 5,602.53/x
  3. Step 3: Cross multiply
    18,753.30x = 28,125 × 5,602.53
  4. Step 4: Simplify right side
    18,753.30x = 157,571,156.25
  5. Step 5: Solve for x
    x = 157,571,156.25/18,753.30
  6. Step 6: Final answer
    x = 8,402.32

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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.