Home / 20,642.19-28,486.89-11,689.50

Finding the Fourth Proportional to 20,642.19, 28,486.89 and 11,689.50

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Solution

The fourth proportional to 20,642.19, 28,486.89 and 11,689.50 is: 16,131.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,642.19 : 28,486.89 = 11,689.50 : x
  2. Step 2: Convert to fraction form
    20,642.19/28,486.89 = 11,689.50/x
  3. Step 3: Cross multiply
    20,642.19x = 28,486.89 × 11,689.50
  4. Step 4: Simplify right side
    20,642.19x = 332,997,500.66
  5. Step 5: Solve for x
    x = 332,997,500.66/20,642.19
  6. Step 6: Final answer
    x = 16,131.89

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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.