Home / 13,147.34-18,143.12-7,178.85

Finding the Fourth Proportional to 13,147.34, 18,143.12 and 7,178.85

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Solution

The fourth proportional to 13,147.34, 18,143.12 and 7,178.85 is: 9,906.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,147.34 : 18,143.12 = 7,178.85 : x
  2. Step 2: Convert to fraction form
    13,147.34/18,143.12 = 7,178.85/x
  3. Step 3: Cross multiply
    13,147.34x = 18,143.12 × 7,178.85
  4. Step 4: Simplify right side
    13,147.34x = 130,246,754.96
  5. Step 5: Solve for x
    x = 130,246,754.96/13,147.34
  6. Step 6: Final answer
    x = 9,906.70

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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.