Home / 2,157.45-2,981.31-1,838.24

Finding the Fourth Proportional to 2,157.45, 2,981.31 and 1,838.24

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Solution

The fourth proportional to 2,157.45, 2,981.31 and 1,838.24 is: 2,540.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,157.45 : 2,981.31 = 1,838.24 : x
  2. Step 2: Convert to fraction form
    2,157.45/2,981.31 = 1,838.24/x
  3. Step 3: Cross multiply
    2,157.45x = 2,981.31 × 1,838.24
  4. Step 4: Simplify right side
    2,157.45x = 5,480,363.29
  5. Step 5: Solve for x
    x = 5,480,363.29/2,157.45
  6. Step 6: Final answer
    x = 2,540.20

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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.