Home / 2,780.81-3,837.53-1,521.92

Finding the Fourth Proportional to 2,780.81, 3,837.53 and 1,521.92

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Solution

The fourth proportional to 2,780.81, 3,837.53 and 1,521.92 is: 2,100.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,780.81 : 3,837.53 = 1,521.92 : x
  2. Step 2: Convert to fraction form
    2,780.81/3,837.53 = 1,521.92/x
  3. Step 3: Cross multiply
    2,780.81x = 3,837.53 × 1,521.92
  4. Step 4: Simplify right side
    2,780.81x = 5,840,418.50
  5. Step 5: Solve for x
    x = 5,840,418.50/2,780.81
  6. Step 6: Final answer
    x = 2,100.25

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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.