Home / 21,785.40-29,990.16-19,546.56

Finding the Fourth Proportional to 21,785.40, 29,990.16 and 19,546.56

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Solution

The fourth proportional to 21,785.40, 29,990.16 and 19,546.56 is: 26,908.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,785.40 : 29,990.16 = 19,546.56 : x
  2. Step 2: Convert to fraction form
    21,785.40/29,990.16 = 19,546.56/x
  3. Step 3: Cross multiply
    21,785.40x = 29,990.16 × 19,546.56
  4. Step 4: Simplify right side
    21,785.40x = 586,204,461.85
  5. Step 5: Solve for x
    x = 586,204,461.85/21,785.40
  6. Step 6: Final answer
    x = 26,908.13

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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.