Home / 3,870.29-5,341.07-2,101.90

Finding the Fourth Proportional to 3,870.29, 5,341.07 and 2,101.90

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Solution

The fourth proportional to 3,870.29, 5,341.07 and 2,101.90 is: 2,900.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,870.29 : 5,341.07 = 2,101.90 : x
  2. Step 2: Convert to fraction form
    3,870.29/5,341.07 = 2,101.90/x
  3. Step 3: Cross multiply
    3,870.29x = 5,341.07 × 2,101.90
  4. Step 4: Simplify right side
    3,870.29x = 11,226,395.03
  5. Step 5: Solve for x
    x = 11,226,395.03/3,870.29
  6. Step 6: Final answer
    x = 2,900.66

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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.