Home / 20,933.51-28,876.55-12,427.29

Finding the Fourth Proportional to 20,933.51, 28,876.55 and 12,427.29

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Solution

The fourth proportional to 20,933.51, 28,876.55 and 12,427.29 is: 17,142.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,933.51 : 28,876.55 = 12,427.29 : x
  2. Step 2: Convert to fraction form
    20,933.51/28,876.55 = 12,427.29/x
  3. Step 3: Cross multiply
    20,933.51x = 28,876.55 × 12,427.29
  4. Step 4: Simplify right side
    20,933.51x = 358,857,198.91
  5. Step 5: Solve for x
    x = 358,857,198.91/20,933.51
  6. Step 6: Final answer
    x = 17,142.72

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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.