Home / 20,995.16-28,974.63-11,563.72

Finding the Fourth Proportional to 20,995.16, 28,974.63 and 11,563.72

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Solution

The fourth proportional to 20,995.16, 28,974.63 and 11,563.72 is: 15,958.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,995.16 : 28,974.63 = 11,563.72 : x
  2. Step 2: Convert to fraction form
    20,995.16/28,974.63 = 11,563.72/x
  3. Step 3: Cross multiply
    20,995.16x = 28,974.63 × 11,563.72
  4. Step 4: Simplify right side
    20,995.16x = 335,054,508.42
  5. Step 5: Solve for x
    x = 335,054,508.42/20,995.16
  6. Step 6: Final answer
    x = 15,958.65

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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.