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Finding the Fourth Proportional to 12,845.70, 19,232.10 and 11,387.70

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Solution

The fourth proportional to 12,845.70, 19,232.10 and 11,387.70 is: 17,049.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,845.70 : 19,232.10 = 11,387.70 : x
  2. Step 2: Convert to fraction form
    12,845.70/19,232.10 = 11,387.70/x
  3. Step 3: Cross multiply
    12,845.70x = 19,232.10 × 11,387.70
  4. Step 4: Simplify right side
    12,845.70x = 219,009,385.17
  5. Step 5: Solve for x
    x = 219,009,385.17/12,845.70
  6. Step 6: Final answer
    x = 17,049.24

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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.