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Finding the Fourth Proportional to 39,793.16, 54,915.90 and 21,888.92

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Solution

The fourth proportional to 39,793.16, 54,915.90 and 21,888.92 is: 30,207.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,793.16 : 54,915.90 = 21,888.92 : x
  2. Step 2: Convert to fraction form
    39,793.16/54,915.90 = 21,888.92/x
  3. Step 3: Cross multiply
    39,793.16x = 54,915.90 × 21,888.92
  4. Step 4: Simplify right side
    39,793.16x = 1,202,049,741.83
  5. Step 5: Solve for x
    x = 1,202,049,741.83/39,793.16
  6. Step 6: Final answer
    x = 30,207.45

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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.