Home / 20,458.40-28,232.40-11,505.96

Finding the Fourth Proportional to 20,458.40, 28,232.40 and 11,505.96

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Solution

The fourth proportional to 20,458.40, 28,232.40 and 11,505.96 is: 15,878.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,458.40 : 28,232.40 = 11,505.96 : x
  2. Step 2: Convert to fraction form
    20,458.40/28,232.40 = 11,505.96/x
  3. Step 3: Cross multiply
    20,458.40x = 28,232.40 × 11,505.96
  4. Step 4: Simplify right side
    20,458.40x = 324,840,865.10
  5. Step 5: Solve for x
    x = 324,840,865.10/20,458.40
  6. Step 6: Final answer
    x = 15,878.12

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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.