Home / 3,888.51-5,366.05-2,120.11

Finding the Fourth Proportional to 3,888.51, 5,366.05 and 2,120.11

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Solution

The fourth proportional to 3,888.51, 5,366.05 and 2,120.11 is: 2,925.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,888.51 : 5,366.05 = 2,120.11 : x
  2. Step 2: Convert to fraction form
    3,888.51/5,366.05 = 2,120.11/x
  3. Step 3: Cross multiply
    3,888.51x = 5,366.05 × 2,120.11
  4. Step 4: Simplify right side
    3,888.51x = 11,376,597.55
  5. Step 5: Solve for x
    x = 11,376,597.55/3,888.51
  6. Step 6: Final answer
    x = 2,925.70

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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.