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Finding the Fourth Proportional to 18,706.95, 25,815.31 and 10,641.48

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Solution

The fourth proportional to 18,706.95, 25,815.31 and 10,641.48 is: 14,685.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,706.95 : 25,815.31 = 10,641.48 : x
  2. Step 2: Convert to fraction form
    18,706.95/25,815.31 = 10,641.48/x
  3. Step 3: Cross multiply
    18,706.95x = 25,815.31 × 10,641.48
  4. Step 4: Simplify right side
    18,706.95x = 274,713,105.06
  5. Step 5: Solve for x
    x = 274,713,105.06/18,706.95
  6. Step 6: Final answer
    x = 14,685.08

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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.