Home / 12,511.40-17,265.64-7,207.20

Finding the Fourth Proportional to 12,511.40, 17,265.64 and 7,207.20

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Solution

The fourth proportional to 12,511.40, 17,265.64 and 7,207.20 is: 9,945.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,511.40 : 17,265.64 = 7,207.20 : x
  2. Step 2: Convert to fraction form
    12,511.40/17,265.64 = 7,207.20/x
  3. Step 3: Cross multiply
    12,511.40x = 17,265.64 × 7,207.20
  4. Step 4: Simplify right side
    12,511.40x = 124,436,920.61
  5. Step 5: Solve for x
    x = 124,436,920.61/12,511.40
  6. Step 6: Final answer
    x = 9,945.88

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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.