Home / 20,416.75-28,177.28-12,964.75

Finding the Fourth Proportional to 20,416.75, 28,177.28 and 12,964.75

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Solution

The fourth proportional to 20,416.75, 28,177.28 and 12,964.75 is: 17,892.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,416.75 : 28,177.28 = 12,964.75 : x
  2. Step 2: Convert to fraction form
    20,416.75/28,177.28 = 12,964.75/x
  3. Step 3: Cross multiply
    20,416.75x = 28,177.28 × 12,964.75
  4. Step 4: Simplify right side
    20,416.75x = 365,311,326.06
  5. Step 5: Solve for x
    x = 365,311,326.06/20,416.75
  6. Step 6: Final answer
    x = 17,892.73

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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.