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Finding the Fourth Proportional to 15,374.66, 21,218.24 and 8,659.85

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Solution

The fourth proportional to 15,374.66, 21,218.24 and 8,659.85 is: 11,951.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,374.66 : 21,218.24 = 8,659.85 : x
  2. Step 2: Convert to fraction form
    15,374.66/21,218.24 = 8,659.85/x
  3. Step 3: Cross multiply
    15,374.66x = 21,218.24 × 8,659.85
  4. Step 4: Simplify right side
    15,374.66x = 183,746,850.36
  5. Step 5: Solve for x
    x = 183,746,850.36/15,374.66
  6. Step 6: Final answer
    x = 11,951.28

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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.