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Finding the Fourth Proportional to 22,616.65, 31,211.02 and 13,662.51

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Solution

The fourth proportional to 22,616.65, 31,211.02 and 13,662.51 is: 18,854.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,616.65 : 31,211.02 = 13,662.51 : x
  2. Step 2: Convert to fraction form
    22,616.65/31,211.02 = 13,662.51/x
  3. Step 3: Cross multiply
    22,616.65x = 31,211.02 × 13,662.51
  4. Step 4: Simplify right side
    22,616.65x = 426,420,772.90
  5. Step 5: Solve for x
    x = 426,420,772.90/22,616.65
  6. Step 6: Final answer
    x = 18,854.28

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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.