Home / 3,609.12-4,980.49-2,117.78

Finding the Fourth Proportional to 3,609.12, 4,980.49 and 2,117.78

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Solution

The fourth proportional to 3,609.12, 4,980.49 and 2,117.78 is: 2,922.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,609.12 : 4,980.49 = 2,117.78 : x
  2. Step 2: Convert to fraction form
    3,609.12/4,980.49 = 2,117.78/x
  3. Step 3: Cross multiply
    3,609.12x = 4,980.49 × 2,117.78
  4. Step 4: Simplify right side
    3,609.12x = 10,547,551.92
  5. Step 5: Solve for x
    x = 10,547,551.92/3,609.12
  6. Step 6: Final answer
    x = 2,922.47

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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.