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Finding the Fourth Proportional to 38,319.78, 52,880.78 and 21,552.78

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Solution

The fourth proportional to 38,319.78, 52,880.78 and 21,552.78 is: 29,742.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,319.78 : 52,880.78 = 21,552.78 : x
  2. Step 2: Convert to fraction form
    38,319.78/52,880.78 = 21,552.78/x
  3. Step 3: Cross multiply
    38,319.78x = 52,880.78 × 21,552.78
  4. Step 4: Simplify right side
    38,319.78x = 1,139,727,817.57
  5. Step 5: Solve for x
    x = 1,139,727,817.57/38,319.78
  6. Step 6: Final answer
    x = 29,742.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.