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Finding the Fourth Proportional to 20,172.60, 30,254.85 and 9,642.60

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Solution

The fourth proportional to 20,172.60, 30,254.85 and 9,642.60 is: 14,461.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,172.60 : 30,254.85 = 9,642.60 : x
  2. Step 2: Convert to fraction form
    20,172.60/30,254.85 = 9,642.60/x
  3. Step 3: Cross multiply
    20,172.60x = 30,254.85 × 9,642.60
  4. Step 4: Simplify right side
    20,172.60x = 291,735,416.61
  5. Step 5: Solve for x
    x = 291,735,416.61/20,172.60
  6. Step 6: Final answer
    x = 14,461.96

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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.