Home / 20,285.24-30,412.20-12,874.28

Finding the Fourth Proportional to 20,285.24, 30,412.20 and 12,874.28

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Solution

The fourth proportional to 20,285.24, 30,412.20 and 12,874.28 is: 19,301.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,285.24 : 30,412.20 = 12,874.28 : x
  2. Step 2: Convert to fraction form
    20,285.24/30,412.20 = 12,874.28/x
  3. Step 3: Cross multiply
    20,285.24x = 30,412.20 × 12,874.28
  4. Step 4: Simplify right side
    20,285.24x = 391,535,178.22
  5. Step 5: Solve for x
    x = 391,535,178.22/20,285.24
  6. Step 6: Final answer
    x = 19,301.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.