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Finding the Fourth Proportional to 5,423.70, 8,117.55 and 3,938.70

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Solution

The fourth proportional to 5,423.70, 8,117.55 and 3,938.70 is: 5,894.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,423.70 : 8,117.55 = 3,938.70 : x
  2. Step 2: Convert to fraction form
    5,423.70/8,117.55 = 3,938.70/x
  3. Step 3: Cross multiply
    5,423.70x = 8,117.55 × 3,938.70
  4. Step 4: Simplify right side
    5,423.70x = 31,972,594.19
  5. Step 5: Solve for x
    x = 31,972,594.19/5,423.70
  6. Step 6: Final answer
    x = 5,894.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.