Home / 20,382.76-28,128.18-11,885.23

Finding the Fourth Proportional to 20,382.76, 28,128.18 and 11,885.23

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Solution

The fourth proportional to 20,382.76, 28,128.18 and 11,885.23 is: 16,401.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,382.76 : 28,128.18 = 11,885.23 : x
  2. Step 2: Convert to fraction form
    20,382.76/28,128.18 = 11,885.23/x
  3. Step 3: Cross multiply
    20,382.76x = 28,128.18 × 11,885.23
  4. Step 4: Simplify right side
    20,382.76x = 334,309,748.14
  5. Step 5: Solve for x
    x = 334,309,748.14/20,382.76
  6. Step 6: Final answer
    x = 16,401.60

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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.