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Finding the Fourth Proportional to 7,390.62, 11,042.64 and 7,132.23

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Solution

The fourth proportional to 7,390.62, 11,042.64 and 7,132.23 is: 10,656.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,390.62 : 11,042.64 = 7,132.23 : x
  2. Step 2: Convert to fraction form
    7,390.62/11,042.64 = 7,132.23/x
  3. Step 3: Cross multiply
    7,390.62x = 11,042.64 × 7,132.23
  4. Step 4: Simplify right side
    7,390.62x = 78,758,648.29
  5. Step 5: Solve for x
    x = 78,758,648.29/7,390.62
  6. Step 6: Final answer
    x = 10,656.57

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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.