Home / 20,429.64-28,189.83-11,475.43

Finding the Fourth Proportional to 20,429.64, 28,189.83 and 11,475.43

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Solution

The fourth proportional to 20,429.64, 28,189.83 and 11,475.43 is: 15,834.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,429.64 : 28,189.83 = 11,475.43 : x
  2. Step 2: Convert to fraction form
    20,429.64/28,189.83 = 11,475.43/x
  3. Step 3: Cross multiply
    20,429.64x = 28,189.83 × 11,475.43
  4. Step 4: Simplify right side
    20,429.64x = 323,490,279.93
  5. Step 5: Solve for x
    x = 323,490,279.93/20,429.64
  6. Step 6: Final answer
    x = 15,834.36

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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.