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Finding the Fourth Proportional to 15,618.96, 21,552.04 and 9,330

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Solution

The fourth proportional to 15,618.96, 21,552.04 and 9,330 is: 12,874.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,618.96 : 21,552.04 = 9,330 : x
  2. Step 2: Convert to fraction form
    15,618.96/21,552.04 = 9,330/x
  3. Step 3: Cross multiply
    15,618.96x = 21,552.04 × 9,330
  4. Step 4: Simplify right side
    15,618.96x = 201,080,533.20
  5. Step 5: Solve for x
    x = 201,080,533.20/15,618.96
  6. Step 6: Final answer
    x = 12,874.13

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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.