Home / 20,400.16-28,139.52-12,015.04

Finding the Fourth Proportional to 20,400.16, 28,139.52 and 12,015.04

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Solution

The fourth proportional to 20,400.16, 28,139.52 and 12,015.04 is: 16,573.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,400.16 : 28,139.52 = 12,015.04 : x
  2. Step 2: Convert to fraction form
    20,400.16/28,139.52 = 12,015.04/x
  3. Step 3: Cross multiply
    20,400.16x = 28,139.52 × 12,015.04
  4. Step 4: Simplify right side
    20,400.16x = 338,097,458.38
  5. Step 5: Solve for x
    x = 338,097,458.38/20,400.16
  6. Step 6: Final answer
    x = 16,573.27

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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.