Home / 21,103.66-31,655.79-5,521.28

Finding the Fourth Proportional to 21,103.66, 31,655.79 and 5,521.28

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Solution

The fourth proportional to 21,103.66, 31,655.79 and 5,521.28 is: 8,282.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,103.66 : 31,655.79 = 5,521.28 : x
  2. Step 2: Convert to fraction form
    21,103.66/31,655.79 = 5,521.28/x
  3. Step 3: Cross multiply
    21,103.66x = 31,655.79 × 5,521.28
  4. Step 4: Simplify right side
    21,103.66x = 174,780,480.21
  5. Step 5: Solve for x
    x = 174,780,480.21/21,103.66
  6. Step 6: Final answer
    x = 8,282.00

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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.