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Finding the Fourth Proportional to 25,938.76, 38,920.44 and 15,429.50

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Solution

The fourth proportional to 25,938.76, 38,920.44 and 15,429.50 is: 23,151.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,938.76 : 38,920.44 = 15,429.50 : x
  2. Step 2: Convert to fraction form
    25,938.76/38,920.44 = 15,429.50/x
  3. Step 3: Cross multiply
    25,938.76x = 38,920.44 × 15,429.50
  4. Step 4: Simplify right side
    25,938.76x = 600,522,896.09
  5. Step 5: Solve for x
    x = 600,522,896.09/25,938.76
  6. Step 6: Final answer
    x = 23,151.57

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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.