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Finding the Fourth Proportional to 25,810.70, 38,658.45 and 21,202.70

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Solution

The fourth proportional to 25,810.70, 38,658.45 and 21,202.70 is: 31,756.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,810.70 : 38,658.45 = 21,202.70 : x
  2. Step 2: Convert to fraction form
    25,810.70/38,658.45 = 21,202.70/x
  3. Step 3: Cross multiply
    25,810.70x = 38,658.45 × 21,202.70
  4. Step 4: Simplify right side
    25,810.70x = 819,663,517.82
  5. Step 5: Solve for x
    x = 819,663,517.82/25,810.70
  6. Step 6: Final answer
    x = 31,756.73

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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.