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Finding the Fourth Proportional to 20,613.64, 30,894.54 and 14,781.64

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Solution

The fourth proportional to 20,613.64, 30,894.54 and 14,781.64 is: 22,153.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,613.64 : 30,894.54 = 14,781.64 : x
  2. Step 2: Convert to fraction form
    20,613.64/30,894.54 = 14,781.64/x
  3. Step 3: Cross multiply
    20,613.64x = 30,894.54 × 14,781.64
  4. Step 4: Simplify right side
    20,613.64x = 456,671,968.25
  5. Step 5: Solve for x
    x = 456,671,968.25/20,613.64
  6. Step 6: Final answer
    x = 22,153.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.