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Finding the Fourth Proportional to 18,661.32, 27,990.99 and 6,973.65

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Solution

The fourth proportional to 18,661.32, 27,990.99 and 6,973.65 is: 10,460.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,661.32 : 27,990.99 = 6,973.65 : x
  2. Step 2: Convert to fraction form
    18,661.32/27,990.99 = 6,973.65/x
  3. Step 3: Cross multiply
    18,661.32x = 27,990.99 × 6,973.65
  4. Step 4: Simplify right side
    18,661.32x = 195,199,367.41
  5. Step 5: Solve for x
    x = 195,199,367.41/18,661.32
  6. Step 6: Final answer
    x = 10,460.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.