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Finding the Fourth Proportional to 40,728.35, 61,074.30 and 18,530.30

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Solution

The fourth proportional to 40,728.35, 61,074.30 and 18,530.30 is: 27,787.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,728.35 : 61,074.30 = 18,530.30 : x
  2. Step 2: Convert to fraction form
    40,728.35/61,074.30 = 18,530.30/x
  3. Step 3: Cross multiply
    40,728.35x = 61,074.30 × 18,530.30
  4. Step 4: Simplify right side
    40,728.35x = 1,131,725,101.29
  5. Step 5: Solve for x
    x = 1,131,725,101.29/40,728.35
  6. Step 6: Final answer
    x = 27,787.16

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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.