Home / 20,485.80-28,269.20-11,532.95

Finding the Fourth Proportional to 20,485.80, 28,269.20 and 11,532.95

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Solution

The fourth proportional to 20,485.80, 28,269.20 and 11,532.95 is: 15,914.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,485.80 : 28,269.20 = 11,532.95 : x
  2. Step 2: Convert to fraction form
    20,485.80/28,269.20 = 11,532.95/x
  3. Step 3: Cross multiply
    20,485.80x = 28,269.20 × 11,532.95
  4. Step 4: Simplify right side
    20,485.80x = 326,027,071.13
  5. Step 5: Solve for x
    x = 326,027,071.13/20,485.80
  6. Step 6: Final answer
    x = 15,914.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.