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Finding the Fourth Proportional to 18,628.75, 25,706.11 and 10,970.81

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Solution

The fourth proportional to 18,628.75, 25,706.11 and 10,970.81 is: 15,138.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,628.75 : 25,706.11 = 10,970.81 : x
  2. Step 2: Convert to fraction form
    18,628.75/25,706.11 = 10,970.81/x
  3. Step 3: Cross multiply
    18,628.75x = 25,706.11 × 10,970.81
  4. Step 4: Simplify right side
    18,628.75x = 282,016,848.65
  5. Step 5: Solve for x
    x = 282,016,848.65/18,628.75
  6. Step 6: Final answer
    x = 15,138.80

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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.