Home / 2,989.87-4,125.82-1,870.75

Finding the Fourth Proportional to 2,989.87, 4,125.82 and 1,870.75

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Solution

The fourth proportional to 2,989.87, 4,125.82 and 1,870.75 is: 2,581.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,989.87 : 4,125.82 = 1,870.75 : x
  2. Step 2: Convert to fraction form
    2,989.87/4,125.82 = 1,870.75/x
  3. Step 3: Cross multiply
    2,989.87x = 4,125.82 × 1,870.75
  4. Step 4: Simplify right side
    2,989.87x = 7,718,377.77
  5. Step 5: Solve for x
    x = 7,718,377.77/2,989.87
  6. Step 6: Final answer
    x = 2,581.51

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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.