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Finding the Fourth Proportional to 12,989.57, 19,489.01 and 4,224.49

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Solution

The fourth proportional to 12,989.57, 19,489.01 and 4,224.49 is: 6,338.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,989.57 : 19,489.01 = 4,224.49 : x
  2. Step 2: Convert to fraction form
    12,989.57/19,489.01 = 4,224.49/x
  3. Step 3: Cross multiply
    12,989.57x = 19,489.01 × 4,224.49
  4. Step 4: Simplify right side
    12,989.57x = 82,331,058.01
  5. Step 5: Solve for x
    x = 82,331,058.01/12,989.57
  6. Step 6: Final answer
    x = 6,338.25

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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.