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Finding the Fourth Proportional to 13,485.59, 18,609.92 and 7,517.24

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Solution

The fourth proportional to 13,485.59, 18,609.92 and 7,517.24 is: 10,373.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,485.59 : 18,609.92 = 7,517.24 : x
  2. Step 2: Convert to fraction form
    13,485.59/18,609.92 = 7,517.24/x
  3. Step 3: Cross multiply
    13,485.59x = 18,609.92 × 7,517.24
  4. Step 4: Simplify right side
    13,485.59x = 139,895,235.02
  5. Step 5: Solve for x
    x = 139,895,235.02/13,485.59
  6. Step 6: Final answer
    x = 10,373.68

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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.