Home / 15,021.59-20,729.85-8,215.74

Finding the Fourth Proportional to 15,021.59, 20,729.85 and 8,215.74

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Solution

The fourth proportional to 15,021.59, 20,729.85 and 8,215.74 is: 11,337.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,021.59 : 20,729.85 = 8,215.74 : x
  2. Step 2: Convert to fraction form
    15,021.59/20,729.85 = 8,215.74/x
  3. Step 3: Cross multiply
    15,021.59x = 20,729.85 × 8,215.74
  4. Step 4: Simplify right side
    15,021.59x = 170,311,057.84
  5. Step 5: Solve for x
    x = 170,311,057.84/15,021.59
  6. Step 6: Final answer
    x = 11,337.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.