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Finding the Fourth Proportional to 39,801.60, 59,680.80 and 13,492.80

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Solution

The fourth proportional to 39,801.60, 59,680.80 and 13,492.80 is: 20,231.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,801.60 : 59,680.80 = 13,492.80 : x
  2. Step 2: Convert to fraction form
    39,801.60/59,680.80 = 13,492.80/x
  3. Step 3: Cross multiply
    39,801.60x = 59,680.80 × 13,492.80
  4. Step 4: Simplify right side
    39,801.60x = 805,261,098.24
  5. Step 5: Solve for x
    x = 805,261,098.24/39,801.60
  6. Step 6: Final answer
    x = 20,231.88

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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.