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Finding the Fourth Proportional to 12,856.37, 17,743.43 and 7,191.43

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Solution

The fourth proportional to 12,856.37, 17,743.43 and 7,191.43 is: 9,925.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,856.37 : 17,743.43 = 7,191.43 : x
  2. Step 2: Convert to fraction form
    12,856.37/17,743.43 = 7,191.43/x
  3. Step 3: Cross multiply
    12,856.37x = 17,743.43 × 7,191.43
  4. Step 4: Simplify right side
    12,856.37x = 127,600,634.80
  5. Step 5: Solve for x
    x = 127,600,634.80/12,856.37
  6. Step 6: Final answer
    x = 9,925.09

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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.