Home / 21,314.13-31,971.80-5,731.75

Finding the Fourth Proportional to 21,314.13, 31,971.80 and 5,731.75

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Solution

The fourth proportional to 21,314.13, 31,971.80 and 5,731.75 is: 8,597.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,314.13 : 31,971.80 = 5,731.75 : x
  2. Step 2: Convert to fraction form
    21,314.13/31,971.80 = 5,731.75/x
  3. Step 3: Cross multiply
    21,314.13x = 31,971.80 × 5,731.75
  4. Step 4: Simplify right side
    21,314.13x = 183,254,364.65
  5. Step 5: Solve for x
    x = 183,254,364.65/21,314.13
  6. Step 6: Final answer
    x = 8,597.79

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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.