Home / 21,324.36-31,984.08-5,740.76

Finding the Fourth Proportional to 21,324.36, 31,984.08 and 5,740.76

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Solution

The fourth proportional to 21,324.36, 31,984.08 and 5,740.76 is: 8,610.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,324.36 : 31,984.08 = 5,740.76 : x
  2. Step 2: Convert to fraction form
    21,324.36/31,984.08 = 5,740.76/x
  3. Step 3: Cross multiply
    21,324.36x = 31,984.08 × 5,740.76
  4. Step 4: Simplify right side
    21,324.36x = 183,612,927.10
  5. Step 5: Solve for x
    x = 183,612,927.10/21,324.36
  6. Step 6: Final answer
    x = 8,610.48

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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.