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Finding the Fourth Proportional to 7,079.90, 9,769.56 and 5,402.39

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Solution

The fourth proportional to 7,079.90, 9,769.56 and 5,402.39 is: 7,454.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,079.90 : 9,769.56 = 5,402.39 : x
  2. Step 2: Convert to fraction form
    7,079.90/9,769.56 = 5,402.39/x
  3. Step 3: Cross multiply
    7,079.90x = 9,769.56 × 5,402.39
  4. Step 4: Simplify right side
    7,079.90x = 52,778,973.25
  5. Step 5: Solve for x
    x = 52,778,973.25/7,079.90
  6. Step 6: Final answer
    x = 7,454.76

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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.