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Finding the Fourth Proportional to 28,471.16, 39,290.22 and 15,895.91

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Solution

The fourth proportional to 28,471.16, 39,290.22 and 15,895.91 is: 21,936.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,471.16 : 39,290.22 = 15,895.91 : x
  2. Step 2: Convert to fraction form
    28,471.16/39,290.22 = 15,895.91/x
  3. Step 3: Cross multiply
    28,471.16x = 39,290.22 × 15,895.91
  4. Step 4: Simplify right side
    28,471.16x = 624,553,604.55
  5. Step 5: Solve for x
    x = 624,553,604.55/28,471.16
  6. Step 6: Final answer
    x = 21,936.36

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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.