Home / 20,718.48-31,067.28-10,189.20

Finding the Fourth Proportional to 20,718.48, 31,067.28 and 10,189.20

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Solution

The fourth proportional to 20,718.48, 31,067.28 and 10,189.20 is: 15,278.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,718.48 : 31,067.28 = 10,189.20 : x
  2. Step 2: Convert to fraction form
    20,718.48/31,067.28 = 10,189.20/x
  3. Step 3: Cross multiply
    20,718.48x = 31,067.28 × 10,189.20
  4. Step 4: Simplify right side
    20,718.48x = 316,550,729.38
  5. Step 5: Solve for x
    x = 316,550,729.38/20,718.48
  6. Step 6: Final answer
    x = 15,278.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.