Home / 13,518.10-18,654.78-7,549.85

Finding the Fourth Proportional to 13,518.10, 18,654.78 and 7,549.85

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Solution

The fourth proportional to 13,518.10, 18,654.78 and 7,549.85 is: 10,418.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,518.10 : 18,654.78 = 7,549.85 : x
  2. Step 2: Convert to fraction form
    13,518.10/18,654.78 = 7,549.85/x
  3. Step 3: Cross multiply
    13,518.10x = 18,654.78 × 7,549.85
  4. Step 4: Simplify right side
    13,518.10x = 140,840,753.03
  5. Step 5: Solve for x
    x = 140,840,753.03/13,518.10
  6. Step 6: Final answer
    x = 10,418.68

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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.