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Finding the Fourth Proportional to 48,491.42, 72,728.88 and 13,422.86

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Solution

The fourth proportional to 48,491.42, 72,728.88 and 13,422.86 is: 20,132.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,491.42 : 72,728.88 = 13,422.86 : x
  2. Step 2: Convert to fraction form
    48,491.42/72,728.88 = 13,422.86/x
  3. Step 3: Cross multiply
    48,491.42x = 72,728.88 × 13,422.86
  4. Step 4: Simplify right side
    48,491.42x = 976,229,574.20
  5. Step 5: Solve for x
    x = 976,229,574.20/48,491.42
  6. Step 6: Final answer
    x = 20,132.01

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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.