Home / 3,888.50-5,366.08-2,120.12

Finding the Fourth Proportional to 3,888.50, 5,366.08 and 2,120.12

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Solution

The fourth proportional to 3,888.50, 5,366.08 and 2,120.12 is: 2,925.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,888.50 : 5,366.08 = 2,120.12 : x
  2. Step 2: Convert to fraction form
    3,888.50/5,366.08 = 2,120.12/x
  3. Step 3: Cross multiply
    3,888.50x = 5,366.08 × 2,120.12
  4. Step 4: Simplify right side
    3,888.50x = 11,376,701.40
  5. Step 5: Solve for x
    x = 11,376,701.40/3,888.50
  6. Step 6: Final answer
    x = 2,925.73

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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.