Home / 20,642.45-28,486.96-11,689.92

Finding the Fourth Proportional to 20,642.45, 28,486.96 and 11,689.92

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Solution

The fourth proportional to 20,642.45, 28,486.96 and 11,689.92 is: 16,132.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,642.45 : 28,486.96 = 11,689.92 : x
  2. Step 2: Convert to fraction form
    20,642.45/28,486.96 = 11,689.92/x
  3. Step 3: Cross multiply
    20,642.45x = 28,486.96 × 11,689.92
  4. Step 4: Simplify right side
    20,642.45x = 333,010,254.22
  5. Step 5: Solve for x
    x = 333,010,254.22/20,642.45
  6. Step 6: Final answer
    x = 16,132.31

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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.