Home / 15,021.08-20,729.52-8,215.50

Finding the Fourth Proportional to 15,021.08, 20,729.52 and 8,215.50

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Solution

The fourth proportional to 15,021.08, 20,729.52 and 8,215.50 is: 11,337.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,021.08 : 20,729.52 = 8,215.50 : x
  2. Step 2: Convert to fraction form
    15,021.08/20,729.52 = 8,215.50/x
  3. Step 3: Cross multiply
    15,021.08x = 20,729.52 × 8,215.50
  4. Step 4: Simplify right side
    15,021.08x = 170,303,371.56
  5. Step 5: Solve for x
    x = 170,303,371.56/15,021.08
  6. Step 6: Final answer
    x = 11,337.63

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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.