Home / 20,919.22-28,868.56-11,488.40

Finding the Fourth Proportional to 20,919.22, 28,868.56 and 11,488.40

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Solution

The fourth proportional to 20,919.22, 28,868.56 and 11,488.40 is: 15,854.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,919.22 : 28,868.56 = 11,488.40 : x
  2. Step 2: Convert to fraction form
    20,919.22/28,868.56 = 11,488.40/x
  3. Step 3: Cross multiply
    20,919.22x = 28,868.56 × 11,488.40
  4. Step 4: Simplify right side
    20,919.22x = 331,653,564.70
  5. Step 5: Solve for x
    x = 331,653,564.70/20,919.22
  6. Step 6: Final answer
    x = 15,854.01

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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.