Home / 20,980.68-28,952.48-12,021.95

Finding the Fourth Proportional to 20,980.68, 28,952.48 and 12,021.95

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Solution

The fourth proportional to 20,980.68, 28,952.48 and 12,021.95 is: 16,589.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,980.68 : 28,952.48 = 12,021.95 : x
  2. Step 2: Convert to fraction form
    20,980.68/28,952.48 = 12,021.95/x
  3. Step 3: Cross multiply
    20,980.68x = 28,952.48 × 12,021.95
  4. Step 4: Simplify right side
    20,980.68x = 348,065,062.06
  5. Step 5: Solve for x
    x = 348,065,062.06/20,980.68
  6. Step 6: Final answer
    x = 16,589.79

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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.