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Finding the Fourth Proportional to 42,336.80, 63,506.50 and 12,754.84

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Solution

The fourth proportional to 42,336.80, 63,506.50 and 12,754.84 is: 19,132.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,336.80 : 63,506.50 = 12,754.84 : x
  2. Step 2: Convert to fraction form
    42,336.80/63,506.50 = 12,754.84/x
  3. Step 3: Cross multiply
    42,336.80x = 63,506.50 × 12,754.84
  4. Step 4: Simplify right side
    42,336.80x = 810,015,246.46
  5. Step 5: Solve for x
    x = 810,015,246.46/42,336.80
  6. Step 6: Final answer
    x = 19,132.65

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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.