Home / 21,013.93-31,530.46-7,867.32

Finding the Fourth Proportional to 21,013.93, 31,530.46 and 7,867.32

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Solution

The fourth proportional to 21,013.93, 31,530.46 and 7,867.32 is: 11,804.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,013.93 : 31,530.46 = 7,867.32 : x
  2. Step 2: Convert to fraction form
    21,013.93/31,530.46 = 7,867.32/x
  3. Step 3: Cross multiply
    21,013.93x = 31,530.46 × 7,867.32
  4. Step 4: Simplify right side
    21,013.93x = 248,060,218.57
  5. Step 5: Solve for x
    x = 248,060,218.57/21,013.93
  6. Step 6: Final answer
    x = 11,804.56

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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.