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Finding the Fourth Proportional to 48,640.66, 72,961.72 and 13,580.50

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Solution

The fourth proportional to 48,640.66, 72,961.72 and 13,580.50 is: 20,370.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,640.66 : 72,961.72 = 13,580.50 : x
  2. Step 2: Convert to fraction form
    48,640.66/72,961.72 = 13,580.50/x
  3. Step 3: Cross multiply
    48,640.66x = 72,961.72 × 13,580.50
  4. Step 4: Simplify right side
    48,640.66x = 990,856,638.46
  5. Step 5: Solve for x
    x = 990,856,638.46/48,640.66
  6. Step 6: Final answer
    x = 20,370.95

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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.