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Finding the Fourth Proportional to 48,478.20, 72,695.70 and 18,886.20

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Solution

The fourth proportional to 48,478.20, 72,695.70 and 18,886.20 is: 28,320.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,478.20 : 72,695.70 = 18,886.20 : x
  2. Step 2: Convert to fraction form
    48,478.20/72,695.70 = 18,886.20/x
  3. Step 3: Cross multiply
    48,478.20x = 72,695.70 × 18,886.20
  4. Step 4: Simplify right side
    48,478.20x = 1,372,945,529.34
  5. Step 5: Solve for x
    x = 1,372,945,529.34/48,478.20
  6. Step 6: Final answer
    x = 28,320.89

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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.