Home / 20,678.31-31,016.66-5,095.53

Finding the Fourth Proportional to 20,678.31, 31,016.66 and 5,095.53

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Solution

The fourth proportional to 20,678.31, 31,016.66 and 5,095.53 is: 7,643.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,678.31 : 31,016.66 = 5,095.53 : x
  2. Step 2: Convert to fraction form
    20,678.31/31,016.66 = 5,095.53/x
  3. Step 3: Cross multiply
    20,678.31x = 31,016.66 × 5,095.53
  4. Step 4: Simplify right side
    20,678.31x = 158,046,296.05
  5. Step 5: Solve for x
    x = 158,046,296.05/20,678.31
  6. Step 6: Final answer
    x = 7,643.10

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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.