Home / 12,639.90-17,440.11-7,331.70

Finding the Fourth Proportional to 12,639.90, 17,440.11 and 7,331.70

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Solution

The fourth proportional to 12,639.90, 17,440.11 and 7,331.70 is: 10,116.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,639.90 : 17,440.11 = 7,331.70 : x
  2. Step 2: Convert to fraction form
    12,639.90/17,440.11 = 7,331.70/x
  3. Step 3: Cross multiply
    12,639.90x = 17,440.11 × 7,331.70
  4. Step 4: Simplify right side
    12,639.90x = 127,865,654.49
  5. Step 5: Solve for x
    x = 127,865,654.49/12,639.90
  6. Step 6: Final answer
    x = 10,116.03

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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.