Home / 13,530.52-18,672.32-7,865.72

Finding the Fourth Proportional to 13,530.52, 18,672.32 and 7,865.72

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Solution

The fourth proportional to 13,530.52, 18,672.32 and 7,865.72 is: 10,854.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,530.52 : 18,672.32 = 7,865.72 : x
  2. Step 2: Convert to fraction form
    13,530.52/18,672.32 = 7,865.72/x
  3. Step 3: Cross multiply
    13,530.52x = 18,672.32 × 7,865.72
  4. Step 4: Simplify right side
    13,530.52x = 146,871,240.87
  5. Step 5: Solve for x
    x = 146,871,240.87/13,530.52
  6. Step 6: Final answer
    x = 10,854.81

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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.