Home / 21,218.08-31,815.92-7,173.28

Finding the Fourth Proportional to 21,218.08, 31,815.92 and 7,173.28

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Solution

The fourth proportional to 21,218.08, 31,815.92 and 7,173.28 is: 10,756.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,218.08 : 31,815.92 = 7,173.28 : x
  2. Step 2: Convert to fraction form
    21,218.08/31,815.92 = 7,173.28/x
  3. Step 3: Cross multiply
    21,218.08x = 31,815.92 × 7,173.28
  4. Step 4: Simplify right side
    21,218.08x = 228,224,502.62
  5. Step 5: Solve for x
    x = 228,224,502.62/21,218.08
  6. Step 6: Final answer
    x = 10,756.13

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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.