Home / 21,785.23-29,867.81-21,391.57

Finding the Fourth Proportional to 21,785.23, 29,867.81 and 21,391.57

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Solution

The fourth proportional to 21,785.23, 29,867.81 and 21,391.57 is: 29,328.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,785.23 : 29,867.81 = 21,391.57 : x
  2. Step 2: Convert to fraction form
    21,785.23/29,867.81 = 21,391.57/x
  3. Step 3: Cross multiply
    21,785.23x = 29,867.81 × 21,391.57
  4. Step 4: Simplify right side
    21,785.23x = 638,919,110.73
  5. Step 5: Solve for x
    x = 638,919,110.73/21,785.23
  6. Step 6: Final answer
    x = 29,328.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.