Home / 13,721.04-18,935.20-7,671

Finding the Fourth Proportional to 13,721.04, 18,935.20 and 7,671

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Solution

The fourth proportional to 13,721.04, 18,935.20 and 7,671 is: 10,586.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,721.04 : 18,935.20 = 7,671 : x
  2. Step 2: Convert to fraction form
    13,721.04/18,935.20 = 7,671/x
  3. Step 3: Cross multiply
    13,721.04x = 18,935.20 × 7,671
  4. Step 4: Simplify right side
    13,721.04x = 145,251,919.20
  5. Step 5: Solve for x
    x = 145,251,919.20/13,721.04
  6. Step 6: Final answer
    x = 10,586.07

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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.