Home / 21,287.57-31,931.36-6,496.56

Finding the Fourth Proportional to 21,287.57, 31,931.36 and 6,496.56

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Solution

The fourth proportional to 21,287.57, 31,931.36 and 6,496.56 is: 9,744.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,287.57 : 31,931.36 = 6,496.56 : x
  2. Step 2: Convert to fraction form
    21,287.57/31,931.36 = 6,496.56/x
  3. Step 3: Cross multiply
    21,287.57x = 31,931.36 × 6,496.56
  4. Step 4: Simplify right side
    21,287.57x = 207,443,963.64
  5. Step 5: Solve for x
    x = 207,443,963.64/21,287.57
  6. Step 6: Final answer
    x = 9,744.84

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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.