Home / 15,928.92-21,981.42-8,855.16

Finding the Fourth Proportional to 15,928.92, 21,981.42 and 8,855.16

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Solution

The fourth proportional to 15,928.92, 21,981.42 and 8,855.16 is: 12,219.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,928.92 : 21,981.42 = 8,855.16 : x
  2. Step 2: Convert to fraction form
    15,928.92/21,981.42 = 8,855.16/x
  3. Step 3: Cross multiply
    15,928.92x = 21,981.42 × 8,855.16
  4. Step 4: Simplify right side
    15,928.92x = 194,648,991.13
  5. Step 5: Solve for x
    x = 194,648,991.13/15,928.92
  6. Step 6: Final answer
    x = 12,219.85

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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.