Home / 21,147.71-31,721.56-6,356.64

Finding the Fourth Proportional to 21,147.71, 31,721.56 and 6,356.64

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Solution

The fourth proportional to 21,147.71, 31,721.56 and 6,356.64 is: 9,534.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,147.71 : 31,721.56 = 6,356.64 : x
  2. Step 2: Convert to fraction form
    21,147.71/31,721.56 = 6,356.64/x
  3. Step 3: Cross multiply
    21,147.71x = 31,721.56 × 6,356.64
  4. Step 4: Simplify right side
    21,147.71x = 201,642,346.77
  5. Step 5: Solve for x
    x = 201,642,346.77/21,147.71
  6. Step 6: Final answer
    x = 9,534.95

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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.