Home / 21,291.41-31,918.55-8,803.64

Finding the Fourth Proportional to 21,291.41, 31,918.55 and 8,803.64

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Solution

The fourth proportional to 21,291.41, 31,918.55 and 8,803.64 is: 13,197.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,291.41 : 31,918.55 = 8,803.64 : x
  2. Step 2: Convert to fraction form
    21,291.41/31,918.55 = 8,803.64/x
  3. Step 3: Cross multiply
    21,291.41x = 31,918.55 × 8,803.64
  4. Step 4: Simplify right side
    21,291.41x = 280,999,332.72
  5. Step 5: Solve for x
    x = 280,999,332.72/21,291.41
  6. Step 6: Final answer
    x = 13,197.78

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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.