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Finding the Fourth Proportional to 5,423.90, 8,123.70 and 5,423.90

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Solution

The fourth proportional to 5,423.90, 8,123.70 and 5,423.90 is: 8,123.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,423.90 : 8,123.70 = 5,423.90 : x
  2. Step 2: Convert to fraction form
    5,423.90/8,123.70 = 5,423.90/x
  3. Step 3: Cross multiply
    5,423.90x = 8,123.70 × 5,423.90
  4. Step 4: Simplify right side
    5,423.90x = 44,062,136.43
  5. Step 5: Solve for x
    x = 44,062,136.43/5,423.90
  6. Step 6: Final answer
    x = 8,123.70

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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.