Home / 15,013.70-20,718.78-8,299.50

Finding the Fourth Proportional to 15,013.70, 20,718.78 and 8,299.50

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Solution

The fourth proportional to 15,013.70, 20,718.78 and 8,299.50 is: 11,453.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,013.70 : 20,718.78 = 8,299.50 : x
  2. Step 2: Convert to fraction form
    15,013.70/20,718.78 = 8,299.50/x
  3. Step 3: Cross multiply
    15,013.70x = 20,718.78 × 8,299.50
  4. Step 4: Simplify right side
    15,013.70x = 171,955,514.61
  5. Step 5: Solve for x
    x = 171,955,514.61/15,013.70
  6. Step 6: Final answer
    x = 11,453.24

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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.