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Finding the Fourth Proportional to 15,888.64, 23,836.48 and 8,489.20

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Solution

The fourth proportional to 15,888.64, 23,836.48 and 8,489.20 is: 12,735.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,888.64 : 23,836.48 = 8,489.20 : x
  2. Step 2: Convert to fraction form
    15,888.64/23,836.48 = 8,489.20/x
  3. Step 3: Cross multiply
    15,888.64x = 23,836.48 × 8,489.20
  4. Step 4: Simplify right side
    15,888.64x = 202,352,646.02
  5. Step 5: Solve for x
    x = 202,352,646.02/15,888.64
  6. Step 6: Final answer
    x = 12,735.68

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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.