Home / 13,639.28-18,822.68-7,672

Finding the Fourth Proportional to 13,639.28, 18,822.68 and 7,672

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Solution

The fourth proportional to 13,639.28, 18,822.68 and 7,672 is: 10,587.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,639.28 : 18,822.68 = 7,672 : x
  2. Step 2: Convert to fraction form
    13,639.28/18,822.68 = 7,672/x
  3. Step 3: Cross multiply
    13,639.28x = 18,822.68 × 7,672
  4. Step 4: Simplify right side
    13,639.28x = 144,407,600.96
  5. Step 5: Solve for x
    x = 144,407,600.96/13,639.28
  6. Step 6: Final answer
    x = 10,587.63

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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.