Home / 21,287.28-31,931.25-7,055.79

Finding the Fourth Proportional to 21,287.28, 31,931.25 and 7,055.79

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Solution

The fourth proportional to 21,287.28, 31,931.25 and 7,055.79 is: 10,583.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,287.28 : 31,931.25 = 7,055.79 : x
  2. Step 2: Convert to fraction form
    21,287.28/31,931.25 = 7,055.79/x
  3. Step 3: Cross multiply
    21,287.28x = 31,931.25 × 7,055.79
  4. Step 4: Simplify right side
    21,287.28x = 225,300,194.44
  5. Step 5: Solve for x
    x = 225,300,194.44/21,287.28
  6. Step 6: Final answer
    x = 10,583.79

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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.