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Finding the Fourth Proportional to 7,129.34, 9,839.76 and 4,297.22

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Solution

The fourth proportional to 7,129.34, 9,839.76 and 4,297.22 is: 5,930.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,129.34 : 9,839.76 = 4,297.22 : x
  2. Step 2: Convert to fraction form
    7,129.34/9,839.76 = 4,297.22/x
  3. Step 3: Cross multiply
    7,129.34x = 9,839.76 × 4,297.22
  4. Step 4: Simplify right side
    7,129.34x = 42,283,613.47
  5. Step 5: Solve for x
    x = 42,283,613.47/7,129.34
  6. Step 6: Final answer
    x = 5,930.93

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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.