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Finding the Fourth Proportional to 18,776.81, 25,915.07 and 10,817.69

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Solution

The fourth proportional to 18,776.81, 25,915.07 and 10,817.69 is: 14,930.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,776.81 : 25,915.07 = 10,817.69 : x
  2. Step 2: Convert to fraction form
    18,776.81/25,915.07 = 10,817.69/x
  3. Step 3: Cross multiply
    18,776.81x = 25,915.07 × 10,817.69
  4. Step 4: Simplify right side
    18,776.81x = 280,341,091.06
  5. Step 5: Solve for x
    x = 280,341,091.06/18,776.81
  6. Step 6: Final answer
    x = 14,930.17

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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.