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Finding the Fourth Proportional to 7,855.80, 10,849.32 and 5,349.12

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Solution

The fourth proportional to 7,855.80, 10,849.32 and 5,349.12 is: 7,387.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,855.80 : 10,849.32 = 5,349.12 : x
  2. Step 2: Convert to fraction form
    7,855.80/10,849.32 = 5,349.12/x
  3. Step 3: Cross multiply
    7,855.80x = 10,849.32 × 5,349.12
  4. Step 4: Simplify right side
    7,855.80x = 58,034,314.60
  5. Step 5: Solve for x
    x = 58,034,314.60/7,855.80
  6. Step 6: Final answer
    x = 7,387.45

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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.