Home / 25,620.80-38,431.20-8,999.60

Finding the Fourth Proportional to 25,620.80, 38,431.20 and 8,999.60

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Solution

The fourth proportional to 25,620.80, 38,431.20 and 8,999.60 is: 13,499.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,620.80 : 38,431.20 = 8,999.60 : x
  2. Step 2: Convert to fraction form
    25,620.80/38,431.20 = 8,999.60/x
  3. Step 3: Cross multiply
    25,620.80x = 38,431.20 × 8,999.60
  4. Step 4: Simplify right side
    25,620.80x = 345,865,427.52
  5. Step 5: Solve for x
    x = 345,865,427.52/25,620.80
  6. Step 6: Final answer
    x = 13,499.40

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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.