Home / 20,299.72-28,014.11-11,348.71

Finding the Fourth Proportional to 20,299.72, 28,014.11 and 11,348.71

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Solution

The fourth proportional to 20,299.72, 28,014.11 and 11,348.71 is: 15,661.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,299.72 : 28,014.11 = 11,348.71 : x
  2. Step 2: Convert to fraction form
    20,299.72/28,014.11 = 11,348.71/x
  3. Step 3: Cross multiply
    20,299.72x = 28,014.11 × 11,348.71
  4. Step 4: Simplify right side
    20,299.72x = 317,923,968.63
  5. Step 5: Solve for x
    x = 317,923,968.63/20,299.72
  6. Step 6: Final answer
    x = 15,661.50

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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.