Home / 12,712.61-17,550.38-8,685.49

Finding the Fourth Proportional to 12,712.61, 17,550.38 and 8,685.49

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Solution

The fourth proportional to 12,712.61, 17,550.38 and 8,685.49 is: 11,990.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,712.61 : 17,550.38 = 8,685.49 : x
  2. Step 2: Convert to fraction form
    12,712.61/17,550.38 = 8,685.49/x
  3. Step 3: Cross multiply
    12,712.61x = 17,550.38 × 8,685.49
  4. Step 4: Simplify right side
    12,712.61x = 152,433,669.04
  5. Step 5: Solve for x
    x = 152,433,669.04/12,712.61
  6. Step 6: Final answer
    x = 11,990.75

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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.