Home / 20,748.78-28,624.68-12,247.47

Finding the Fourth Proportional to 20,748.78, 28,624.68 and 12,247.47

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Solution

The fourth proportional to 20,748.78, 28,624.68 and 12,247.47 is: 16,896.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,748.78 : 28,624.68 = 12,247.47 : x
  2. Step 2: Convert to fraction form
    20,748.78/28,624.68 = 12,247.47/x
  3. Step 3: Cross multiply
    20,748.78x = 28,624.68 × 12,247.47
  4. Step 4: Simplify right side
    20,748.78x = 350,579,909.56
  5. Step 5: Solve for x
    x = 350,579,909.56/20,748.78
  6. Step 6: Final answer
    x = 16,896.41

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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.