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Finding the Fourth Proportional to 48,189.20, 72,283.80 and 13,128.80

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Solution

The fourth proportional to 48,189.20, 72,283.80 and 13,128.80 is: 19,693.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,189.20 : 72,283.80 = 13,128.80 : x
  2. Step 2: Convert to fraction form
    48,189.20/72,283.80 = 13,128.80/x
  3. Step 3: Cross multiply
    48,189.20x = 72,283.80 × 13,128.80
  4. Step 4: Simplify right side
    48,189.20x = 948,999,553.44
  5. Step 5: Solve for x
    x = 948,999,553.44/48,189.20
  6. Step 6: Final answer
    x = 19,693.20

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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.