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Finding the Fourth Proportional to 48,415.40, 72,648.90 and 18,834.20

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Solution

The fourth proportional to 48,415.40, 72,648.90 and 18,834.20 is: 28,261.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,415.40 : 72,648.90 = 18,834.20 : x
  2. Step 2: Convert to fraction form
    48,415.40/72,648.90 = 18,834.20/x
  3. Step 3: Cross multiply
    48,415.40x = 72,648.90 × 18,834.20
  4. Step 4: Simplify right side
    48,415.40x = 1,368,283,912.38
  5. Step 5: Solve for x
    x = 1,368,283,912.38/48,415.40
  6. Step 6: Final answer
    x = 28,261.34

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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.