Home / 20,919.74-28,869.14-11,359.66

Finding the Fourth Proportional to 20,919.74, 28,869.14 and 11,359.66

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Solution

The fourth proportional to 20,919.74, 28,869.14 and 11,359.66 is: 15,676.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,919.74 : 28,869.14 = 11,359.66 : x
  2. Step 2: Convert to fraction form
    20,919.74/28,869.14 = 11,359.66/x
  3. Step 3: Cross multiply
    20,919.74x = 28,869.14 × 11,359.66
  4. Step 4: Simplify right side
    20,919.74x = 327,943,614.89
  5. Step 5: Solve for x
    x = 327,943,614.89/20,919.74
  6. Step 6: Final answer
    x = 15,676.28

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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.