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Finding the Fourth Proportional to 7,191.80, 9,925.27 and 4,005.71

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Solution

The fourth proportional to 7,191.80, 9,925.27 and 4,005.71 is: 5,528.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,191.80 : 9,925.27 = 4,005.71 : x
  2. Step 2: Convert to fraction form
    7,191.80/9,925.27 = 4,005.71/x
  3. Step 3: Cross multiply
    7,191.80x = 9,925.27 × 4,005.71
  4. Step 4: Simplify right side
    7,191.80x = 39,757,693.65
  5. Step 5: Solve for x
    x = 39,757,693.65/7,191.80
  6. Step 6: Final answer
    x = 5,528.20

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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.