Home / 3,881.28-5,358.54-2,885.40

Finding the Fourth Proportional to 3,881.28, 5,358.54 and 2,885.40

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Solution

The fourth proportional to 3,881.28, 5,358.54 and 2,885.40 is: 3,983.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,881.28 : 5,358.54 = 2,885.40 : x
  2. Step 2: Convert to fraction form
    3,881.28/5,358.54 = 2,885.40/x
  3. Step 3: Cross multiply
    3,881.28x = 5,358.54 × 2,885.40
  4. Step 4: Simplify right side
    3,881.28x = 15,461,531.32
  5. Step 5: Solve for x
    x = 15,461,531.32/3,881.28
  6. Step 6: Final answer
    x = 3,983.62

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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.