Home / 15,928.68-21,981.42-8,855.04

Finding the Fourth Proportional to 15,928.68, 21,981.42 and 8,855.04

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Solution

The fourth proportional to 15,928.68, 21,981.42 and 8,855.04 is: 12,219.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,928.68 : 21,981.42 = 8,855.04 : x
  2. Step 2: Convert to fraction form
    15,928.68/21,981.42 = 8,855.04/x
  3. Step 3: Cross multiply
    15,928.68x = 21,981.42 × 8,855.04
  4. Step 4: Simplify right side
    15,928.68x = 194,646,353.36
  5. Step 5: Solve for x
    x = 194,646,353.36/15,928.68
  6. Step 6: Final answer
    x = 12,219.87

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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.