Home / 20,581.76-30,872.64-4,999.28

Finding the Fourth Proportional to 20,581.76, 30,872.64 and 4,999.28

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Solution

The fourth proportional to 20,581.76, 30,872.64 and 4,999.28 is: 7,498.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,581.76 : 30,872.64 = 4,999.28 : x
  2. Step 2: Convert to fraction form
    20,581.76/30,872.64 = 4,999.28/x
  3. Step 3: Cross multiply
    20,581.76x = 30,872.64 × 4,999.28
  4. Step 4: Simplify right side
    20,581.76x = 154,340,971.70
  5. Step 5: Solve for x
    x = 154,340,971.70/20,581.76
  6. Step 6: Final answer
    x = 7,498.92

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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.