Home / 15,929.30-21,982.46-8,855.72

Finding the Fourth Proportional to 15,929.30, 21,982.46 and 8,855.72

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Solution

The fourth proportional to 15,929.30, 21,982.46 and 8,855.72 is: 12,220.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,929.30 : 21,982.46 = 8,855.72 : x
  2. Step 2: Convert to fraction form
    15,929.30/21,982.46 = 8,855.72/x
  3. Step 3: Cross multiply
    15,929.30x = 21,982.46 × 8,855.72
  4. Step 4: Simplify right side
    15,929.30x = 194,670,438.91
  5. Step 5: Solve for x
    x = 194,670,438.91/15,929.30
  6. Step 6: Final answer
    x = 12,220.91

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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.