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Finding the Fourth Proportional to 5,367.70, 7,407.93 and 3,129.40

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Solution

The fourth proportional to 5,367.70, 7,407.93 and 3,129.40 is: 4,318.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,367.70 : 7,407.93 = 3,129.40 : x
  2. Step 2: Convert to fraction form
    5,367.70/7,407.93 = 3,129.40/x
  3. Step 3: Cross multiply
    5,367.70x = 7,407.93 × 3,129.40
  4. Step 4: Simplify right side
    5,367.70x = 23,182,376.14
  5. Step 5: Solve for x
    x = 23,182,376.14/5,367.70
  6. Step 6: Final answer
    x = 4,318.87

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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.