Home / 20,922.12-28,873.17-11,490.66

Finding the Fourth Proportional to 20,922.12, 28,873.17 and 11,490.66

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Solution

The fourth proportional to 20,922.12, 28,873.17 and 11,490.66 is: 15,857.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,922.12 : 28,873.17 = 11,490.66 : x
  2. Step 2: Convert to fraction form
    20,922.12/28,873.17 = 11,490.66/x
  3. Step 3: Cross multiply
    20,922.12x = 28,873.17 × 11,490.66
  4. Step 4: Simplify right side
    20,922.12x = 331,771,779.59
  5. Step 5: Solve for x
    x = 331,771,779.59/20,922.12
  6. Step 6: Final answer
    x = 15,857.46

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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.