Home / 15,331-21,156.60-8,617.75

Finding the Fourth Proportional to 15,331, 21,156.60 and 8,617.75

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Solution

The fourth proportional to 15,331, 21,156.60 and 8,617.75 is: 11,892.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,331 : 21,156.60 = 8,617.75 : x
  2. Step 2: Convert to fraction form
    15,331/21,156.60 = 8,617.75/x
  3. Step 3: Cross multiply
    15,331x = 21,156.60 × 8,617.75
  4. Step 4: Simplify right side
    15,331x = 182,322,289.65
  5. Step 5: Solve for x
    x = 182,322,289.65/15,331
  6. Step 6: Final answer
    x = 11,892.39

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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.