Home / 2,120.28-2,924.64-1,531.68

Finding the Fourth Proportional to 2,120.28, 2,924.64 and 1,531.68

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Solution

The fourth proportional to 2,120.28, 2,924.64 and 1,531.68 is: 2,112.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,120.28 : 2,924.64 = 1,531.68 : x
  2. Step 2: Convert to fraction form
    2,120.28/2,924.64 = 1,531.68/x
  3. Step 3: Cross multiply
    2,120.28x = 2,924.64 × 1,531.68
  4. Step 4: Simplify right side
    2,120.28x = 4,479,612.60
  5. Step 5: Solve for x
    x = 4,479,612.60/2,120.28
  6. Step 6: Final answer
    x = 2,112.75

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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.