Home / 15,423.67-21,286.56-8,709.58

Finding the Fourth Proportional to 15,423.67, 21,286.56 and 8,709.58

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Solution

The fourth proportional to 15,423.67, 21,286.56 and 8,709.58 is: 12,020.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,423.67 : 21,286.56 = 8,709.58 : x
  2. Step 2: Convert to fraction form
    15,423.67/21,286.56 = 8,709.58/x
  3. Step 3: Cross multiply
    15,423.67x = 21,286.56 × 8,709.58
  4. Step 4: Simplify right side
    15,423.67x = 185,396,997.24
  5. Step 5: Solve for x
    x = 185,396,997.24/15,423.67
  6. Step 6: Final answer
    x = 12,020.29

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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.