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Finding the Fourth Proportional to 12,926.81, 17,840.94 and 7,893.95

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Solution

The fourth proportional to 12,926.81, 17,840.94 and 7,893.95 is: 10,894.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,926.81 : 17,840.94 = 7,893.95 : x
  2. Step 2: Convert to fraction form
    12,926.81/17,840.94 = 7,893.95/x
  3. Step 3: Cross multiply
    12,926.81x = 17,840.94 × 7,893.95
  4. Step 4: Simplify right side
    12,926.81x = 140,835,488.31
  5. Step 5: Solve for x
    x = 140,835,488.31/12,926.81
  6. Step 6: Final answer
    x = 10,894.84

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.