Home / 21,270.27-31,905.40-5,687.49

Finding the Fourth Proportional to 21,270.27, 31,905.40 and 5,687.49

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Solution

The fourth proportional to 21,270.27, 31,905.40 and 5,687.49 is: 8,531.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,270.27 : 31,905.40 = 5,687.49 : x
  2. Step 2: Convert to fraction form
    21,270.27/31,905.40 = 5,687.49/x
  3. Step 3: Cross multiply
    21,270.27x = 31,905.40 × 5,687.49
  4. Step 4: Simplify right side
    21,270.27x = 181,461,509.58
  5. Step 5: Solve for x
    x = 181,461,509.58/21,270.27
  6. Step 6: Final answer
    x = 8,531.23

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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.