Home / 15,786.28-21,785.22-9,072.04

Finding the Fourth Proportional to 15,786.28, 21,785.22 and 9,072.04

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Solution

The fourth proportional to 15,786.28, 21,785.22 and 9,072.04 is: 12,519.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,786.28 : 21,785.22 = 9,072.04 : x
  2. Step 2: Convert to fraction form
    15,786.28/21,785.22 = 9,072.04/x
  3. Step 3: Cross multiply
    15,786.28x = 21,785.22 × 9,072.04
  4. Step 4: Simplify right side
    15,786.28x = 197,636,387.25
  5. Step 5: Solve for x
    x = 197,636,387.25/15,786.28
  6. Step 6: Final answer
    x = 12,519.50

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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.