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Finding the Fourth Proportional to 14,689.96, 20,272.42 and 8,065.96

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Solution

The fourth proportional to 14,689.96, 20,272.42 and 8,065.96 is: 11,131.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,689.96 : 20,272.42 = 8,065.96 : x
  2. Step 2: Convert to fraction form
    14,689.96/20,272.42 = 8,065.96/x
  3. Step 3: Cross multiply
    14,689.96x = 20,272.42 × 8,065.96
  4. Step 4: Simplify right side
    14,689.96x = 163,516,528.82
  5. Step 5: Solve for x
    x = 163,516,528.82/14,689.96
  6. Step 6: Final answer
    x = 11,131.18

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Half scale
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Double scale
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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.