Home / 20,874.94-31,322.52-9,186.64

Finding the Fourth Proportional to 20,874.94, 31,322.52 and 9,186.64

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Solution

The fourth proportional to 20,874.94, 31,322.52 and 9,186.64 is: 13,784.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,874.94 : 31,322.52 = 9,186.64 : x
  2. Step 2: Convert to fraction form
    20,874.94/31,322.52 = 9,186.64/x
  3. Step 3: Cross multiply
    20,874.94x = 31,322.52 × 9,186.64
  4. Step 4: Simplify right side
    20,874.94x = 287,748,715.13
  5. Step 5: Solve for x
    x = 287,748,715.13/20,874.94
  6. Step 6: Final answer
    x = 13,784.41

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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.