Home / 15,928.89-21,981.75-8,855.25

Finding the Fourth Proportional to 15,928.89, 21,981.75 and 8,855.25

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Solution

The fourth proportional to 15,928.89, 21,981.75 and 8,855.25 is: 12,220.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,928.89 : 21,981.75 = 8,855.25 : x
  2. Step 2: Convert to fraction form
    15,928.89/21,981.75 = 8,855.25/x
  3. Step 3: Cross multiply
    15,928.89x = 21,981.75 × 8,855.25
  4. Step 4: Simplify right side
    15,928.89x = 194,653,891.69
  5. Step 5: Solve for x
    x = 194,653,891.69/15,928.89
  6. Step 6: Final answer
    x = 12,220.18

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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.