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Finding the Fourth Proportional to 13,073.61, 18,038.65 and 7,407.87

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Solution

The fourth proportional to 13,073.61, 18,038.65 and 7,407.87 is: 10,221.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,073.61 : 18,038.65 = 7,407.87 : x
  2. Step 2: Convert to fraction form
    13,073.61/18,038.65 = 7,407.87/x
  3. Step 3: Cross multiply
    13,073.61x = 18,038.65 × 7,407.87
  4. Step 4: Simplify right side
    13,073.61x = 133,627,974.18
  5. Step 5: Solve for x
    x = 133,627,974.18/13,073.61
  6. Step 6: Final answer
    x = 10,221.20

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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.