Home / 13,721.94-18,935.78-7,672.52

Finding the Fourth Proportional to 13,721.94, 18,935.78 and 7,672.52

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Solution

The fourth proportional to 13,721.94, 18,935.78 and 7,672.52 is: 10,587.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,721.94 : 18,935.78 = 7,672.52 : x
  2. Step 2: Convert to fraction form
    13,721.94/18,935.78 = 7,672.52/x
  3. Step 3: Cross multiply
    13,721.94x = 18,935.78 × 7,672.52
  4. Step 4: Simplify right side
    13,721.94x = 145,285,159.74
  5. Step 5: Solve for x
    x = 145,285,159.74/13,721.94
  6. Step 6: Final answer
    x = 10,587.80

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.