Home / 20,299.50-28,013.31-12,340.23

Finding the Fourth Proportional to 20,299.50, 28,013.31 and 12,340.23

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Solution

The fourth proportional to 20,299.50, 28,013.31 and 12,340.23 is: 17,029.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,299.50 : 28,013.31 = 12,340.23 : x
  2. Step 2: Convert to fraction form
    20,299.50/28,013.31 = 12,340.23/x
  3. Step 3: Cross multiply
    20,299.50x = 28,013.31 × 12,340.23
  4. Step 4: Simplify right side
    20,299.50x = 345,690,688.46
  5. Step 5: Solve for x
    x = 345,690,688.46/20,299.50
  6. Step 6: Final answer
    x = 17,029.52

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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.