Home / 2,113.12-3,171.30-1,384.12

Finding the Fourth Proportional to 2,113.12, 3,171.30 and 1,384.12

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Solution

The fourth proportional to 2,113.12, 3,171.30 and 1,384.12 is: 2,077.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,113.12 : 3,171.30 = 1,384.12 : x
  2. Step 2: Convert to fraction form
    2,113.12/3,171.30 = 1,384.12/x
  3. Step 3: Cross multiply
    2,113.12x = 3,171.30 × 1,384.12
  4. Step 4: Simplify right side
    2,113.12x = 4,389,459.76
  5. Step 5: Solve for x
    x = 4,389,459.76/2,113.12
  6. Step 6: Final answer
    x = 2,077.24

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.