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Finding the Fourth Proportional to 3,609.69, 4,981.41 and 2,117.63

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Solution

The fourth proportional to 3,609.69, 4,981.41 and 2,117.63 is: 2,922.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,609.69 : 4,981.41 = 2,117.63 : x
  2. Step 2: Convert to fraction form
    3,609.69/4,981.41 = 2,117.63/x
  3. Step 3: Cross multiply
    3,609.69x = 4,981.41 × 2,117.63
  4. Step 4: Simplify right side
    3,609.69x = 10,548,795.71
  5. Step 5: Solve for x
    x = 10,548,795.71/3,609.69
  6. Step 6: Final answer
    x = 2,922.35

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Double scale
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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.