Home / 3,908.34-5,386.40-3,087.20

Finding the Fourth Proportional to 3,908.34, 5,386.40 and 3,087.20

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Solution

The fourth proportional to 3,908.34, 5,386.40 and 3,087.20 is: 4,254.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,908.34 : 5,386.40 = 3,087.20 : x
  2. Step 2: Convert to fraction form
    3,908.34/5,386.40 = 3,087.20/x
  3. Step 3: Cross multiply
    3,908.34x = 5,386.40 × 3,087.20
  4. Step 4: Simplify right side
    3,908.34x = 16,628,903.69
  5. Step 5: Solve for x
    x = 16,628,903.69/3,908.34
  6. Step 6: Final answer
    x = 4,254.72

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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.