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Finding the Fourth Proportional to 3,616.84, 4,990.71 and 2,124.19

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Solution

The fourth proportional to 3,616.84, 4,990.71 and 2,124.19 is: 2,931.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,616.84 : 4,990.71 = 2,124.19 : x
  2. Step 2: Convert to fraction form
    3,616.84/4,990.71 = 2,124.19/x
  3. Step 3: Cross multiply
    3,616.84x = 4,990.71 × 2,124.19
  4. Step 4: Simplify right side
    3,616.84x = 10,601,216.27
  5. Step 5: Solve for x
    x = 10,601,216.27/3,616.84
  6. Step 6: Final answer
    x = 2,931.07

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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.