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Finding the Fourth Proportional to 22,559.82, 31,129.95 and 12,486.87

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Solution

The fourth proportional to 22,559.82, 31,129.95 and 12,486.87 is: 17,230.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,559.82 : 31,129.95 = 12,486.87 : x
  2. Step 2: Convert to fraction form
    22,559.82/31,129.95 = 12,486.87/x
  3. Step 3: Cross multiply
    22,559.82x = 31,129.95 × 12,486.87
  4. Step 4: Simplify right side
    22,559.82x = 388,715,638.76
  5. Step 5: Solve for x
    x = 388,715,638.76/22,559.82
  6. Step 6: Final answer
    x = 17,230.44

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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.