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Finding the Fourth Proportional to 13,719.60, 18,920.05 and 9,463.86

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Solution

The fourth proportional to 13,719.60, 18,920.05 and 9,463.86 is: 13,051.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,719.60 : 18,920.05 = 9,463.86 : x
  2. Step 2: Convert to fraction form
    13,719.60/18,920.05 = 9,463.86/x
  3. Step 3: Cross multiply
    13,719.60x = 18,920.05 × 9,463.86
  4. Step 4: Simplify right side
    13,719.60x = 179,056,680.73
  5. Step 5: Solve for x
    x = 179,056,680.73/13,719.60
  6. Step 6: Final answer
    x = 13,051.16

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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.