Home / 20,681.96-28,538.61-11,729.03

Finding the Fourth Proportional to 20,681.96, 28,538.61 and 11,729.03

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Solution

The fourth proportional to 20,681.96, 28,538.61 and 11,729.03 is: 16,184.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,681.96 : 28,538.61 = 11,729.03 : x
  2. Step 2: Convert to fraction form
    20,681.96/28,538.61 = 11,729.03/x
  3. Step 3: Cross multiply
    20,681.96x = 28,538.61 × 11,729.03
  4. Step 4: Simplify right side
    20,681.96x = 334,730,212.85
  5. Step 5: Solve for x
    x = 334,730,212.85/20,681.96
  6. Step 6: Final answer
    x = 16,184.65

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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.