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Finding the Fourth Proportional to 12,586.47, 18,887.64 and 7,043.43

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Solution

The fourth proportional to 12,586.47, 18,887.64 and 7,043.43 is: 10,569.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,586.47 : 18,887.64 = 7,043.43 : x
  2. Step 2: Convert to fraction form
    12,586.47/18,887.64 = 7,043.43/x
  3. Step 3: Cross multiply
    12,586.47x = 18,887.64 × 7,043.43
  4. Step 4: Simplify right side
    12,586.47x = 133,033,770.21
  5. Step 5: Solve for x
    x = 133,033,770.21/12,586.47
  6. Step 6: Final answer
    x = 10,569.59

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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.