Home / 18,960.64-28,443.12-5,110.72

Finding the Fourth Proportional to 18,960.64, 28,443.12 and 5,110.72

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Solution

The fourth proportional to 18,960.64, 28,443.12 and 5,110.72 is: 7,666.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,960.64 : 28,443.12 = 5,110.72 : x
  2. Step 2: Convert to fraction form
    18,960.64/28,443.12 = 5,110.72/x
  3. Step 3: Cross multiply
    18,960.64x = 28,443.12 × 5,110.72
  4. Step 4: Simplify right side
    18,960.64x = 145,364,822.25
  5. Step 5: Solve for x
    x = 145,364,822.25/18,960.64
  6. Step 6: Final answer
    x = 7,666.66

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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.