Home / 3,938.12-5,428.80-2,521.64

Finding the Fourth Proportional to 3,938.12, 5,428.80 and 2,521.64

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Solution

The fourth proportional to 3,938.12, 5,428.80 and 2,521.64 is: 3,476.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,938.12 : 5,428.80 = 2,521.64 : x
  2. Step 2: Convert to fraction form
    3,938.12/5,428.80 = 2,521.64/x
  3. Step 3: Cross multiply
    3,938.12x = 5,428.80 × 2,521.64
  4. Step 4: Simplify right side
    3,938.12x = 13,689,479.23
  5. Step 5: Solve for x
    x = 13,689,479.23/3,938.12
  6. Step 6: Final answer
    x = 3,476.15

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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.