Home / 12,403.98-17,115.57-7,931.70

Finding the Fourth Proportional to 12,403.98, 17,115.57 and 7,931.70

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Solution

The fourth proportional to 12,403.98, 17,115.57 and 7,931.70 is: 10,944.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,403.98 : 17,115.57 = 7,931.70 : x
  2. Step 2: Convert to fraction form
    12,403.98/17,115.57 = 7,931.70/x
  3. Step 3: Cross multiply
    12,403.98x = 17,115.57 × 7,931.70
  4. Step 4: Simplify right side
    12,403.98x = 135,755,566.57
  5. Step 5: Solve for x
    x = 135,755,566.57/12,403.98
  6. Step 6: Final answer
    x = 10,944.52

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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.