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Finding the Fourth Proportional to 48,287.40, 72,387.90 and 18,695.40

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Solution

The fourth proportional to 48,287.40, 72,387.90 and 18,695.40 is: 28,026.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,287.40 : 72,387.90 = 18,695.40 : x
  2. Step 2: Convert to fraction form
    48,287.40/72,387.90 = 18,695.40/x
  3. Step 3: Cross multiply
    48,287.40x = 72,387.90 × 18,695.40
  4. Step 4: Simplify right side
    48,287.40x = 1,353,320,745.66
  5. Step 5: Solve for x
    x = 1,353,320,745.66/48,287.40
  6. Step 6: Final answer
    x = 28,026.37

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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.