Home / 20,854.73-28,779.51-11,423.30

Finding the Fourth Proportional to 20,854.73, 28,779.51 and 11,423.30

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Solution

The fourth proportional to 20,854.73, 28,779.51 and 11,423.30 is: 15,764.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,854.73 : 28,779.51 = 11,423.30 : x
  2. Step 2: Convert to fraction form
    20,854.73/28,779.51 = 11,423.30/x
  3. Step 3: Cross multiply
    20,854.73x = 28,779.51 × 11,423.30
  4. Step 4: Simplify right side
    20,854.73x = 328,756,832.69
  5. Step 5: Solve for x
    x = 328,756,832.69/20,854.73
  6. Step 6: Final answer
    x = 15,764.14

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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.