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Finding the Fourth Proportional to 25,555.29, 38,281.90 and 20,299.20

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Solution

The fourth proportional to 25,555.29, 38,281.90 and 20,299.20 is: 30,408.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,555.29 : 38,281.90 = 20,299.20 : x
  2. Step 2: Convert to fraction form
    25,555.29/38,281.90 = 20,299.20/x
  3. Step 3: Cross multiply
    25,555.29x = 38,281.90 × 20,299.20
  4. Step 4: Simplify right side
    25,555.29x = 777,091,944.48
  5. Step 5: Solve for x
    x = 777,091,944.48/25,555.29
  6. Step 6: Final answer
    x = 30,408.26

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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.