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Finding the Fourth Proportional to 42,651.60, 63,982.20 and 13,069.20

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Solution

The fourth proportional to 42,651.60, 63,982.20 and 13,069.20 is: 19,605.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,651.60 : 63,982.20 = 13,069.20 : x
  2. Step 2: Convert to fraction form
    42,651.60/63,982.20 = 13,069.20/x
  3. Step 3: Cross multiply
    42,651.60x = 63,982.20 × 13,069.20
  4. Step 4: Simplify right side
    42,651.60x = 836,196,168.24
  5. Step 5: Solve for x
    x = 836,196,168.24/42,651.60
  6. Step 6: Final answer
    x = 19,605.27

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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.