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Finding the Fourth Proportional to 43,121.88, 64,685.55 and 13,540.88

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Solution

The fourth proportional to 43,121.88, 64,685.55 and 13,540.88 is: 20,312.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,121.88 : 64,685.55 = 13,540.88 : x
  2. Step 2: Convert to fraction form
    43,121.88/64,685.55 = 13,540.88/x
  3. Step 3: Cross multiply
    43,121.88x = 64,685.55 × 13,540.88
  4. Step 4: Simplify right side
    43,121.88x = 875,899,270.28
  5. Step 5: Solve for x
    x = 875,899,270.28/43,121.88
  6. Step 6: Final answer
    x = 20,312.18

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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.