Home / 40,209.60-60,314.40-13,915.20

Finding the Fourth Proportional to 40,209.60, 60,314.40 and 13,915.20

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Solution

The fourth proportional to 40,209.60, 60,314.40 and 13,915.20 is: 20,872.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,209.60 : 60,314.40 = 13,915.20 : x
  2. Step 2: Convert to fraction form
    40,209.60/60,314.40 = 13,915.20/x
  3. Step 3: Cross multiply
    40,209.60x = 60,314.40 × 13,915.20
  4. Step 4: Simplify right side
    40,209.60x = 839,286,938.88
  5. Step 5: Solve for x
    x = 839,286,938.88/40,209.60
  6. Step 6: Final answer
    x = 20,872.80

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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.