Home / 12,397.90-17,110.30-7,091.68

Finding the Fourth Proportional to 12,397.90, 17,110.30 and 7,091.68

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Solution

The fourth proportional to 12,397.90, 17,110.30 and 7,091.68 is: 9,787.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,397.90 : 17,110.30 = 7,091.68 : x
  2. Step 2: Convert to fraction form
    12,397.90/17,110.30 = 7,091.68/x
  3. Step 3: Cross multiply
    12,397.90x = 17,110.30 × 7,091.68
  4. Step 4: Simplify right side
    12,397.90x = 121,340,772.30
  5. Step 5: Solve for x
    x = 121,340,772.30/12,397.90
  6. Step 6: Final answer
    x = 9,787.20

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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.