Home / 3,987.26-5,510.01-2,990.81

Finding the Fourth Proportional to 3,987.26, 5,510.01 and 2,990.81

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Solution

The fourth proportional to 3,987.26, 5,510.01 and 2,990.81 is: 4,133.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,987.26 : 5,510.01 = 2,990.81 : x
  2. Step 2: Convert to fraction form
    3,987.26/5,510.01 = 2,990.81/x
  3. Step 3: Cross multiply
    3,987.26x = 5,510.01 × 2,990.81
  4. Step 4: Simplify right side
    3,987.26x = 16,479,393.01
  5. Step 5: Solve for x
    x = 16,479,393.01/3,987.26
  6. Step 6: Final answer
    x = 4,133.01

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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.