Home / 3,870.70-5,341.56-2,102.30

Finding the Fourth Proportional to 3,870.70, 5,341.56 and 2,102.30

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Solution

The fourth proportional to 3,870.70, 5,341.56 and 2,102.30 is: 2,901.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,870.70 : 5,341.56 = 2,102.30 : x
  2. Step 2: Convert to fraction form
    3,870.70/5,341.56 = 2,102.30/x
  3. Step 3: Cross multiply
    3,870.70x = 5,341.56 × 2,102.30
  4. Step 4: Simplify right side
    3,870.70x = 11,229,551.08
  5. Step 5: Solve for x
    x = 11,229,551.08/3,870.70
  6. Step 6: Final answer
    x = 2,901.17

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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.