Home / 12,686.35-17,502.90-7,376.80

Finding the Fourth Proportional to 12,686.35, 17,502.90 and 7,376.80

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Solution

The fourth proportional to 12,686.35, 17,502.90 and 7,376.80 is: 10,177.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,686.35 : 17,502.90 = 7,376.80 : x
  2. Step 2: Convert to fraction form
    12,686.35/17,502.90 = 7,376.80/x
  3. Step 3: Cross multiply
    12,686.35x = 17,502.90 × 7,376.80
  4. Step 4: Simplify right side
    12,686.35x = 129,115,355.84
  5. Step 5: Solve for x
    x = 129,115,355.84/12,686.35
  6. Step 6: Final answer
    x = 10,177.50

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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.