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Finding the Fourth Proportional to 13,073.20, 18,040.95 and 7,407.92

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Solution

The fourth proportional to 13,073.20, 18,040.95 and 7,407.92 is: 10,222.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,073.20 : 18,040.95 = 7,407.92 : x
  2. Step 2: Convert to fraction form
    13,073.20/18,040.95 = 7,407.92/x
  3. Step 3: Cross multiply
    13,073.20x = 18,040.95 × 7,407.92
  4. Step 4: Simplify right side
    13,073.20x = 133,645,959.43
  5. Step 5: Solve for x
    x = 133,645,959.43/13,073.20
  6. Step 6: Final answer
    x = 10,222.90

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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.