Home / 18,820.42-28,207.85-10,491.59

Finding the Fourth Proportional to 18,820.42, 28,207.85 and 10,491.59

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Solution

The fourth proportional to 18,820.42, 28,207.85 and 10,491.59 is: 15,724.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,820.42 : 28,207.85 = 10,491.59 : x
  2. Step 2: Convert to fraction form
    18,820.42/28,207.85 = 10,491.59/x
  3. Step 3: Cross multiply
    18,820.42x = 28,207.85 × 10,491.59
  4. Step 4: Simplify right side
    18,820.42x = 295,945,215.04
  5. Step 5: Solve for x
    x = 295,945,215.04/18,820.42
  6. Step 6: Final answer
    x = 15,724.69

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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.