Home / 3,885.80-5,362.43-2,117.40

Finding the Fourth Proportional to 3,885.80, 5,362.43 and 2,117.40

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Solution

The fourth proportional to 3,885.80, 5,362.43 and 2,117.40 is: 2,922.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,885.80 : 5,362.43 = 2,117.40 : x
  2. Step 2: Convert to fraction form
    3,885.80/5,362.43 = 2,117.40/x
  3. Step 3: Cross multiply
    3,885.80x = 5,362.43 × 2,117.40
  4. Step 4: Simplify right side
    3,885.80x = 11,354,398.70
  5. Step 5: Solve for x
    x = 11,354,398.70/3,885.80
  6. Step 6: Final answer
    x = 2,922.03

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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.