Home / 3,870.65-5,341.46-2,102.15

Finding the Fourth Proportional to 3,870.65, 5,341.46 and 2,102.15

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Solution

The fourth proportional to 3,870.65, 5,341.46 and 2,102.15 is: 2,900.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,870.65 : 5,341.46 = 2,102.15 : x
  2. Step 2: Convert to fraction form
    3,870.65/5,341.46 = 2,102.15/x
  3. Step 3: Cross multiply
    3,870.65x = 5,341.46 × 2,102.15
  4. Step 4: Simplify right side
    3,870.65x = 11,228,512.92
  5. Step 5: Solve for x
    x = 11,228,512.92/3,870.65
  6. Step 6: Final answer
    x = 2,900.94

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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.