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Finding the Fourth Proportional to 25,772.70, 38,671.20 and 19,211.70

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Solution

The fourth proportional to 25,772.70, 38,671.20 and 19,211.70 is: 28,826.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,772.70 : 38,671.20 = 19,211.70 : x
  2. Step 2: Convert to fraction form
    25,772.70/38,671.20 = 19,211.70/x
  3. Step 3: Cross multiply
    25,772.70x = 38,671.20 × 19,211.70
  4. Step 4: Simplify right side
    25,772.70x = 742,939,493.04
  5. Step 5: Solve for x
    x = 742,939,493.04/25,772.70
  6. Step 6: Final answer
    x = 28,826.61

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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.