Home / 20,243.92-30,302.60-12,856.72

Finding the Fourth Proportional to 20,243.92, 30,302.60 and 12,856.72

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Solution

The fourth proportional to 20,243.92, 30,302.60 and 12,856.72 is: 19,244.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,243.92 : 30,302.60 = 12,856.72 : x
  2. Step 2: Convert to fraction form
    20,243.92/30,302.60 = 12,856.72/x
  3. Step 3: Cross multiply
    20,243.92x = 30,302.60 × 12,856.72
  4. Step 4: Simplify right side
    20,243.92x = 389,592,043.47
  5. Step 5: Solve for x
    x = 389,592,043.47/20,243.92
  6. Step 6: Final answer
    x = 19,244.89

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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.