Home / 15,929.28-21,981.83-8,855.55

Finding the Fourth Proportional to 15,929.28, 21,981.83 and 8,855.55

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Solution

The fourth proportional to 15,929.28, 21,981.83 and 8,855.55 is: 12,220.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,929.28 : 21,981.83 = 8,855.55 : x
  2. Step 2: Convert to fraction form
    15,929.28/21,981.83 = 8,855.55/x
  3. Step 3: Cross multiply
    15,929.28x = 21,981.83 × 8,855.55
  4. Step 4: Simplify right side
    15,929.28x = 194,661,150.38
  5. Step 5: Solve for x
    x = 194,661,150.38/15,929.28
  6. Step 6: Final answer
    x = 12,220.34

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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.