Home / 20,814.30-31,232.79-7,664.76

Finding the Fourth Proportional to 20,814.30, 31,232.79 and 7,664.76

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Solution

The fourth proportional to 20,814.30, 31,232.79 and 7,664.76 is: 11,501.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,814.30 : 31,232.79 = 7,664.76 : x
  2. Step 2: Convert to fraction form
    20,814.30/31,232.79 = 7,664.76/x
  3. Step 3: Cross multiply
    20,814.30x = 31,232.79 × 7,664.76
  4. Step 4: Simplify right side
    20,814.30x = 239,391,839.48
  5. Step 5: Solve for x
    x = 239,391,839.48/20,814.30
  6. Step 6: Final answer
    x = 11,501.32

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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.