Home / 21,158.58-31,740.75-7,308.66

Finding the Fourth Proportional to 21,158.58, 31,740.75 and 7,308.66

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Solution

The fourth proportional to 21,158.58, 31,740.75 and 7,308.66 is: 10,963.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,158.58 : 31,740.75 = 7,308.66 : x
  2. Step 2: Convert to fraction form
    21,158.58/31,740.75 = 7,308.66/x
  3. Step 3: Cross multiply
    21,158.58x = 31,740.75 × 7,308.66
  4. Step 4: Simplify right side
    21,158.58x = 231,982,349.90
  5. Step 5: Solve for x
    x = 231,982,349.90/21,158.58
  6. Step 6: Final answer
    x = 10,963.98

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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.