Home / 20,103.12-27,742.28-11,151.98

Finding the Fourth Proportional to 20,103.12, 27,742.28 and 11,151.98

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Solution

The fourth proportional to 20,103.12, 27,742.28 and 11,151.98 is: 15,389.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,103.12 : 27,742.28 = 11,151.98 : x
  2. Step 2: Convert to fraction form
    20,103.12/27,742.28 = 11,151.98/x
  3. Step 3: Cross multiply
    20,103.12x = 27,742.28 × 11,151.98
  4. Step 4: Simplify right side
    20,103.12x = 309,381,351.71
  5. Step 5: Solve for x
    x = 309,381,351.71/20,103.12
  6. Step 6: Final answer
    x = 15,389.72

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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.