Home / 20,178.40-27,845.76-11,225.76

Finding the Fourth Proportional to 20,178.40, 27,845.76 and 11,225.76

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Solution

The fourth proportional to 20,178.40, 27,845.76 and 11,225.76 is: 15,491.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,178.40 : 27,845.76 = 11,225.76 : x
  2. Step 2: Convert to fraction form
    20,178.40/27,845.76 = 11,225.76/x
  3. Step 3: Cross multiply
    20,178.40x = 27,845.76 × 11,225.76
  4. Step 4: Simplify right side
    20,178.40x = 312,589,818.78
  5. Step 5: Solve for x
    x = 312,589,818.78/20,178.40
  6. Step 6: Final answer
    x = 15,491.31

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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.