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Finding the Fourth Proportional to 18,494.48, 27,730.16 and 7,815.34

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Solution

The fourth proportional to 18,494.48, 27,730.16 and 7,815.34 is: 11,718.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,494.48 : 27,730.16 = 7,815.34 : x
  2. Step 2: Convert to fraction form
    18,494.48/27,730.16 = 7,815.34/x
  3. Step 3: Cross multiply
    18,494.48x = 27,730.16 × 7,815.34
  4. Step 4: Simplify right side
    18,494.48x = 216,720,628.65
  5. Step 5: Solve for x
    x = 216,720,628.65/18,494.48
  6. Step 6: Final answer
    x = 11,718.13

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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.