Home / 1,938.24-2,693.40-1,918.20

Finding the Fourth Proportional to 1,938.24, 2,693.40 and 1,918.20

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Solution

The fourth proportional to 1,938.24, 2,693.40 and 1,918.20 is: 2,665.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,938.24 : 2,693.40 = 1,918.20 : x
  2. Step 2: Convert to fraction form
    1,938.24/2,693.40 = 1,918.20/x
  3. Step 3: Cross multiply
    1,938.24x = 2,693.40 × 1,918.20
  4. Step 4: Simplify right side
    1,938.24x = 5,166,479.88
  5. Step 5: Solve for x
    x = 5,166,479.88/1,938.24
  6. Step 6: Final answer
    x = 2,665.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.