Home / 2,117.12-2,920.64-1,371.32

Finding the Fourth Proportional to 2,117.12, 2,920.64 and 1,371.32

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Solution

The fourth proportional to 2,117.12, 2,920.64 and 1,371.32 is: 1,891.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,117.12 : 2,920.64 = 1,371.32 : x
  2. Step 2: Convert to fraction form
    2,117.12/2,920.64 = 1,371.32/x
  3. Step 3: Cross multiply
    2,117.12x = 2,920.64 × 1,371.32
  4. Step 4: Simplify right side
    2,117.12x = 4,005,132.04
  5. Step 5: Solve for x
    x = 4,005,132.04/2,117.12
  6. Step 6: Final answer
    x = 1,891.78

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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.