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Finding the Fourth Proportional to 15,207.60, 20,987 and 8,493.32

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Solution

The fourth proportional to 15,207.60, 20,987 and 8,493.32 is: 11,721.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,207.60 : 20,987 = 8,493.32 : x
  2. Step 2: Convert to fraction form
    15,207.60/20,987 = 8,493.32/x
  3. Step 3: Cross multiply
    15,207.60x = 20,987 × 8,493.32
  4. Step 4: Simplify right side
    15,207.60x = 178,249,306.84
  5. Step 5: Solve for x
    x = 178,249,306.84/15,207.60
  6. Step 6: Final answer
    x = 11,721.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.