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Finding the Fourth Proportional to 3,873.84, 5,347.80 and 2,638.32

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Solution

The fourth proportional to 3,873.84, 5,347.80 and 2,638.32 is: 3,642.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,873.84 : 5,347.80 = 2,638.32 : x
  2. Step 2: Convert to fraction form
    3,873.84/5,347.80 = 2,638.32/x
  3. Step 3: Cross multiply
    3,873.84x = 5,347.80 × 2,638.32
  4. Step 4: Simplify right side
    3,873.84x = 14,109,207.70
  5. Step 5: Solve for x
    x = 14,109,207.70/3,873.84
  6. Step 6: Final answer
    x = 3,642.18

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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.