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Finding the Fourth Proportional to 7,449.68, 11,117.92 and 7,148.28

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Solution

The fourth proportional to 7,449.68, 11,117.92 and 7,148.28 is: 10,668.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,449.68 : 11,117.92 = 7,148.28 : x
  2. Step 2: Convert to fraction form
    7,449.68/11,117.92 = 7,148.28/x
  3. Step 3: Cross multiply
    7,449.68x = 11,117.92 × 7,148.28
  4. Step 4: Simplify right side
    7,449.68x = 79,474,005.18
  5. Step 5: Solve for x
    x = 79,474,005.18/7,449.68
  6. Step 6: Final answer
    x = 10,668.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.