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Finding the Fourth Proportional to 7,881.80, 10,891.35 and 5,753.70

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Solution

The fourth proportional to 7,881.80, 10,891.35 and 5,753.70 is: 7,950.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,881.80 : 10,891.35 = 5,753.70 : x
  2. Step 2: Convert to fraction form
    7,881.80/10,891.35 = 5,753.70/x
  3. Step 3: Cross multiply
    7,881.80x = 10,891.35 × 5,753.70
  4. Step 4: Simplify right side
    7,881.80x = 62,665,560.50
  5. Step 5: Solve for x
    x = 62,665,560.50/7,881.80
  6. Step 6: Final answer
    x = 7,950.67

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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.