Home / 20,808-31,215.36-6,960.24

Finding the Fourth Proportional to 20,808, 31,215.36 and 6,960.24

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Solution

The fourth proportional to 20,808, 31,215.36 and 6,960.24 is: 10,441.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,808 : 31,215.36 = 6,960.24 : x
  2. Step 2: Convert to fraction form
    20,808/31,215.36 = 6,960.24/x
  3. Step 3: Cross multiply
    20,808x = 31,215.36 × 6,960.24
  4. Step 4: Simplify right side
    20,808x = 217,266,397.29
  5. Step 5: Solve for x
    x = 217,266,397.29/20,808
  6. Step 6: Final answer
    x = 10,441.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.