Home / 20,590.28-28,404.15-13,784.57

Finding the Fourth Proportional to 20,590.28, 28,404.15 and 13,784.57

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Solution

The fourth proportional to 20,590.28, 28,404.15 and 13,784.57 is: 19,015.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,590.28 : 28,404.15 = 13,784.57 : x
  2. Step 2: Convert to fraction form
    20,590.28/28,404.15 = 13,784.57/x
  3. Step 3: Cross multiply
    20,590.28x = 28,404.15 × 13,784.57
  4. Step 4: Simplify right side
    20,590.28x = 391,538,993.97
  5. Step 5: Solve for x
    x = 391,538,993.97/20,590.28
  6. Step 6: Final answer
    x = 19,015.72

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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.