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Finding the Fourth Proportional to 15,869, 21,899.22 and 8,796.49

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Solution

The fourth proportional to 15,869, 21,899.22 and 8,796.49 is: 12,139.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,869 : 21,899.22 = 8,796.49 : x
  2. Step 2: Convert to fraction form
    15,869/21,899.22 = 8,796.49/x
  3. Step 3: Cross multiply
    15,869x = 21,899.22 × 8,796.49
  4. Step 4: Simplify right side
    15,869x = 192,636,269.74
  5. Step 5: Solve for x
    x = 192,636,269.74/15,869
  6. Step 6: Final answer
    x = 12,139.16

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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.