Home / 13,147.57-18,158.40-8,691.55

Finding the Fourth Proportional to 13,147.57, 18,158.40 and 8,691.55

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Solution

The fourth proportional to 13,147.57, 18,158.40 and 8,691.55 is: 12,004.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,147.57 : 18,158.40 = 8,691.55 : x
  2. Step 2: Convert to fraction form
    13,147.57/18,158.40 = 8,691.55/x
  3. Step 3: Cross multiply
    13,147.57x = 18,158.40 × 8,691.55
  4. Step 4: Simplify right side
    13,147.57x = 157,824,722.71
  5. Step 5: Solve for x
    x = 157,824,722.71/13,147.57
  6. Step 6: Final answer
    x = 12,004.10

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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.