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Finding the Fourth Proportional to 20,715.60, 31,070.60 and 8,244.80

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Solution

The fourth proportional to 20,715.60, 31,070.60 and 8,244.80 is: 12,366.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,715.60 : 31,070.60 = 8,244.80 : x
  2. Step 2: Convert to fraction form
    20,715.60/31,070.60 = 8,244.80/x
  3. Step 3: Cross multiply
    20,715.60x = 31,070.60 × 8,244.80
  4. Step 4: Simplify right side
    20,715.60x = 256,170,882.88
  5. Step 5: Solve for x
    x = 256,170,882.88/20,715.60
  6. Step 6: Final answer
    x = 12,366.09

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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.