Home / 20,681.61-28,542.09-11,729.88

Finding the Fourth Proportional to 20,681.61, 28,542.09 and 11,729.88

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Solution

The fourth proportional to 20,681.61, 28,542.09 and 11,729.88 is: 16,188.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,681.61 : 28,542.09 = 11,729.88 : x
  2. Step 2: Convert to fraction form
    20,681.61/28,542.09 = 11,729.88/x
  3. Step 3: Cross multiply
    20,681.61x = 28,542.09 × 11,729.88
  4. Step 4: Simplify right side
    20,681.61x = 334,795,290.65
  5. Step 5: Solve for x
    x = 334,795,290.65/20,681.61
  6. Step 6: Final answer
    x = 16,188.07

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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.