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Finding the Fourth Proportional to 45,672.16, 68,512.80 and 12,392.76

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Solution

The fourth proportional to 45,672.16, 68,512.80 and 12,392.76 is: 18,590.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,672.16 : 68,512.80 = 12,392.76 : x
  2. Step 2: Convert to fraction form
    45,672.16/68,512.80 = 12,392.76/x
  3. Step 3: Cross multiply
    45,672.16x = 68,512.80 × 12,392.76
  4. Step 4: Simplify right side
    45,672.16x = 849,062,687.33
  5. Step 5: Solve for x
    x = 849,062,687.33/45,672.16
  6. Step 6: Final answer
    x = 18,590.38

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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.