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Finding the Fourth Proportional to 12,922.77, 19,391.77 and 5,425.72

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Solution

The fourth proportional to 12,922.77, 19,391.77 and 5,425.72 is: 8,141.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,922.77 : 19,391.77 = 5,425.72 : x
  2. Step 2: Convert to fraction form
    12,922.77/19,391.77 = 5,425.72/x
  3. Step 3: Cross multiply
    12,922.77x = 19,391.77 × 5,425.72
  4. Step 4: Simplify right side
    12,922.77x = 105,214,272.63
  5. Step 5: Solve for x
    x = 105,214,272.63/12,922.77
  6. Step 6: Final answer
    x = 8,141.77

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1.5x scale

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.