Home / 20,385.64-30,581.50-7,236.91

Finding the Fourth Proportional to 20,385.64, 30,581.50 and 7,236.91

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Solution

The fourth proportional to 20,385.64, 30,581.50 and 7,236.91 is: 10,856.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,385.64 : 30,581.50 = 7,236.91 : x
  2. Step 2: Convert to fraction form
    20,385.64/30,581.50 = 7,236.91/x
  3. Step 3: Cross multiply
    20,385.64x = 30,581.50 × 7,236.91
  4. Step 4: Simplify right side
    20,385.64x = 221,315,563.17
  5. Step 5: Solve for x
    x = 221,315,563.17/20,385.64
  6. Step 6: Final answer
    x = 10,856.44

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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.