Home / 13,147.13-18,143.10-7,178.93

Finding the Fourth Proportional to 13,147.13, 18,143.10 and 7,178.93

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Solution

The fourth proportional to 13,147.13, 18,143.10 and 7,178.93 is: 9,906.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,147.13 : 18,143.10 = 7,178.93 : x
  2. Step 2: Convert to fraction form
    13,147.13/18,143.10 = 7,178.93/x
  3. Step 3: Cross multiply
    13,147.13x = 18,143.10 × 7,178.93
  4. Step 4: Simplify right side
    13,147.13x = 130,248,044.88
  5. Step 5: Solve for x
    x = 130,248,044.88/13,147.13
  6. Step 6: Final answer
    x = 9,906.96

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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.