Home / 20,919.63-28,869.29-11,488.39

Finding the Fourth Proportional to 20,919.63, 28,869.29 and 11,488.39

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Solution

The fourth proportional to 20,919.63, 28,869.29 and 11,488.39 is: 15,854.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,919.63 : 28,869.29 = 11,488.39 : x
  2. Step 2: Convert to fraction form
    20,919.63/28,869.29 = 11,488.39/x
  3. Step 3: Cross multiply
    20,919.63x = 28,869.29 × 11,488.39
  4. Step 4: Simplify right side
    20,919.63x = 331,661,605.10
  5. Step 5: Solve for x
    x = 331,661,605.10/20,919.63
  6. Step 6: Final answer
    x = 15,854.09

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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.