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Finding the Fourth Proportional to 15,159.60, 20,921.64 and 8,446.56

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Solution

The fourth proportional to 15,159.60, 20,921.64 and 8,446.56 is: 11,657.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,159.60 : 20,921.64 = 8,446.56 : x
  2. Step 2: Convert to fraction form
    15,159.60/20,921.64 = 8,446.56/x
  3. Step 3: Cross multiply
    15,159.60x = 20,921.64 × 8,446.56
  4. Step 4: Simplify right side
    15,159.60x = 176,715,887.56
  5. Step 5: Solve for x
    x = 176,715,887.56/15,159.60
  6. Step 6: Final answer
    x = 11,657.03

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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.