Home / 3,903.62-5,386.95-2,135.20

Finding the Fourth Proportional to 3,903.62, 5,386.95 and 2,135.20

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Solution

The fourth proportional to 3,903.62, 5,386.95 and 2,135.20 is: 2,946.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,903.62 : 5,386.95 = 2,135.20 : x
  2. Step 2: Convert to fraction form
    3,903.62/5,386.95 = 2,135.20/x
  3. Step 3: Cross multiply
    3,903.62x = 5,386.95 × 2,135.20
  4. Step 4: Simplify right side
    3,903.62x = 11,502,232.47
  5. Step 5: Solve for x
    x = 11,502,232.47/3,903.62
  6. Step 6: Final answer
    x = 2,946.56

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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.