Home / 15,013.76-20,720.06-8,299.24

Finding the Fourth Proportional to 15,013.76, 20,720.06 and 8,299.24

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Solution

The fourth proportional to 15,013.76, 20,720.06 and 8,299.24 is: 11,453.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,013.76 : 20,720.06 = 8,299.24 : x
  2. Step 2: Convert to fraction form
    15,013.76/20,720.06 = 8,299.24/x
  3. Step 3: Cross multiply
    15,013.76x = 20,720.06 × 8,299.24
  4. Step 4: Simplify right side
    15,013.76x = 171,960,750.75
  5. Step 5: Solve for x
    x = 171,960,750.75/15,013.76
  6. Step 6: Final answer
    x = 11,453.54

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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.