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Finding the Fourth Proportional to 25,889.70, 38,834.55 and 18,453.90

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Solution

The fourth proportional to 25,889.70, 38,834.55 and 18,453.90 is: 27,680.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,889.70 : 38,834.55 = 18,453.90 : x
  2. Step 2: Convert to fraction form
    25,889.70/38,834.55 = 18,453.90/x
  3. Step 3: Cross multiply
    25,889.70x = 38,834.55 × 18,453.90
  4. Step 4: Simplify right side
    25,889.70x = 716,648,902.25
  5. Step 5: Solve for x
    x = 716,648,902.25/25,889.70
  6. Step 6: Final answer
    x = 27,680.85

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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.