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Finding the Fourth Proportional to 13,459.80, 18,572.52 and 8,155.20

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Solution

The fourth proportional to 13,459.80, 18,572.52 and 8,155.20 is: 11,252.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,459.80 : 18,572.52 = 8,155.20 : x
  2. Step 2: Convert to fraction form
    13,459.80/18,572.52 = 8,155.20/x
  3. Step 3: Cross multiply
    13,459.80x = 18,572.52 × 8,155.20
  4. Step 4: Simplify right side
    13,459.80x = 151,462,615.10
  5. Step 5: Solve for x
    x = 151,462,615.10/13,459.80
  6. Step 6: Final answer
    x = 11,252.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.