Home / 13,148.18-18,143.76-7,178.66

Finding the Fourth Proportional to 13,148.18, 18,143.76 and 7,178.66

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Solution

The fourth proportional to 13,148.18, 18,143.76 and 7,178.66 is: 9,906.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,148.18 : 18,143.76 = 7,178.66 : x
  2. Step 2: Convert to fraction form
    13,148.18/18,143.76 = 7,178.66/x
  3. Step 3: Cross multiply
    13,148.18x = 18,143.76 × 7,178.66
  4. Step 4: Simplify right side
    13,148.18x = 130,247,884.16
  5. Step 5: Solve for x
    x = 130,247,884.16/13,148.18
  6. Step 6: Final answer
    x = 9,906.15

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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.