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Finding the Fourth Proportional to 10,321.65, 15,477 and 4,770.21

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Solution

The fourth proportional to 10,321.65, 15,477 and 4,770.21 is: 7,152.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,321.65 : 15,477 = 4,770.21 : x
  2. Step 2: Convert to fraction form
    10,321.65/15,477 = 4,770.21/x
  3. Step 3: Cross multiply
    10,321.65x = 15,477 × 4,770.21
  4. Step 4: Simplify right side
    10,321.65x = 73,828,540.17
  5. Step 5: Solve for x
    x = 73,828,540.17/10,321.65
  6. Step 6: Final answer
    x = 7,152.78

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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.