Home / 20,873.72-31,240.86-12,412.76

Finding the Fourth Proportional to 20,873.72, 31,240.86 and 12,412.76

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Solution

The fourth proportional to 20,873.72, 31,240.86 and 12,412.76 is: 18,577.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,873.72 : 31,240.86 = 12,412.76 : x
  2. Step 2: Convert to fraction form
    20,873.72/31,240.86 = 12,412.76/x
  3. Step 3: Cross multiply
    20,873.72x = 31,240.86 × 12,412.76
  4. Step 4: Simplify right side
    20,873.72x = 387,785,270.35
  5. Step 5: Solve for x
    x = 387,785,270.35/20,873.72
  6. Step 6: Final answer
    x = 18,577.68

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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.