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Finding the Fourth Proportional to 7,240.78, 9,981.38 and 5,666.14

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Solution

The fourth proportional to 7,240.78, 9,981.38 and 5,666.14 is: 7,810.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,240.78 : 9,981.38 = 5,666.14 : x
  2. Step 2: Convert to fraction form
    7,240.78/9,981.38 = 5,666.14/x
  3. Step 3: Cross multiply
    7,240.78x = 9,981.38 × 5,666.14
  4. Step 4: Simplify right side
    7,240.78x = 56,555,896.47
  5. Step 5: Solve for x
    x = 56,555,896.47/7,240.78
  6. Step 6: Final answer
    x = 7,810.75

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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.