Home / 7,961.85-10,988.55-5,731.11

Finding the Fourth Proportional to 7,961.85, 10,988.55 and 5,731.11

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Solution

The fourth proportional to 7,961.85, 10,988.55 and 5,731.11 is: 7,909.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,961.85 : 10,988.55 = 5,731.11 : x
  2. Step 2: Convert to fraction form
    7,961.85/10,988.55 = 5,731.11/x
  3. Step 3: Cross multiply
    7,961.85x = 10,988.55 × 5,731.11
  4. Step 4: Simplify right side
    7,961.85x = 62,976,588.79
  5. Step 5: Solve for x
    x = 62,976,588.79/7,961.85
  6. Step 6: Final answer
    x = 7,909.79

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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.