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Finding the Fourth Proportional to 3,616.65, 4,990.68 and 2,124.63

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Solution

The fourth proportional to 3,616.65, 4,990.68 and 2,124.63 is: 2,931.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,616.65 : 4,990.68 = 2,124.63 : x
  2. Step 2: Convert to fraction form
    3,616.65/4,990.68 = 2,124.63/x
  3. Step 3: Cross multiply
    3,616.65x = 4,990.68 × 2,124.63
  4. Step 4: Simplify right side
    3,616.65x = 10,603,348.45
  5. Step 5: Solve for x
    x = 10,603,348.45/3,616.65
  6. Step 6: Final answer
    x = 2,931.81

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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.