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Finding the Fourth Proportional to 25,851.60, 38,806.20 and 14,187.60

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Solution

The fourth proportional to 25,851.60, 38,806.20 and 14,187.60 is: 21,297.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,851.60 : 38,806.20 = 14,187.60 : x
  2. Step 2: Convert to fraction form
    25,851.60/38,806.20 = 14,187.60/x
  3. Step 3: Cross multiply
    25,851.60x = 38,806.20 × 14,187.60
  4. Step 4: Simplify right side
    25,851.60x = 550,566,843.12
  5. Step 5: Solve for x
    x = 550,566,843.12/25,851.60
  6. Step 6: Final answer
    x = 21,297.21

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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.