Home / 20,874.78-28,808.36-11,925.20

Finding the Fourth Proportional to 20,874.78, 28,808.36 and 11,925.20

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Solution

The fourth proportional to 20,874.78, 28,808.36 and 11,925.20 is: 16,457.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,874.78 : 28,808.36 = 11,925.20 : x
  2. Step 2: Convert to fraction form
    20,874.78/28,808.36 = 11,925.20/x
  3. Step 3: Cross multiply
    20,874.78x = 28,808.36 × 11,925.20
  4. Step 4: Simplify right side
    20,874.78x = 343,545,251.00
  5. Step 5: Solve for x
    x = 343,545,251.00/20,874.78
  6. Step 6: Final answer
    x = 16,457.43

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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.