Home / 21,112.74-31,658.46-7,785.06

Finding the Fourth Proportional to 21,112.74, 31,658.46 and 7,785.06

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Solution

The fourth proportional to 21,112.74, 31,658.46 and 7,785.06 is: 11,673.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,112.74 : 31,658.46 = 7,785.06 : x
  2. Step 2: Convert to fraction form
    21,112.74/31,658.46 = 7,785.06/x
  3. Step 3: Cross multiply
    21,112.74x = 31,658.46 × 7,785.06
  4. Step 4: Simplify right side
    21,112.74x = 246,463,010.61
  5. Step 5: Solve for x
    x = 246,463,010.61/21,112.74
  6. Step 6: Final answer
    x = 11,673.66

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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.