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Finding the Fourth Proportional to 19,488.60, 29,168.10 and 13,656.60

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Solution

The fourth proportional to 19,488.60, 29,168.10 and 13,656.60 is: 20,439.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,488.60 : 29,168.10 = 13,656.60 : x
  2. Step 2: Convert to fraction form
    19,488.60/29,168.10 = 13,656.60/x
  3. Step 3: Cross multiply
    19,488.60x = 29,168.10 × 13,656.60
  4. Step 4: Simplify right side
    19,488.60x = 398,337,074.46
  5. Step 5: Solve for x
    x = 398,337,074.46/19,488.60
  6. Step 6: Final answer
    x = 20,439.49

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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.