Home / 20,874.36-28,808.61-11,923.20

Finding the Fourth Proportional to 20,874.36, 28,808.61 and 11,923.20

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Solution

The fourth proportional to 20,874.36, 28,808.61 and 11,923.20 is: 16,455.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,874.36 : 28,808.61 = 11,923.20 : x
  2. Step 2: Convert to fraction form
    20,874.36/28,808.61 = 11,923.20/x
  3. Step 3: Cross multiply
    20,874.36x = 28,808.61 × 11,923.20
  4. Step 4: Simplify right side
    20,874.36x = 343,490,818.75
  5. Step 5: Solve for x
    x = 343,490,818.75/20,874.36
  6. Step 6: Final answer
    x = 16,455.15

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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.