Home / 2,113.10-3,169.65-1,378.70

Finding the Fourth Proportional to 2,113.10, 3,169.65 and 1,378.70

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Solution

The fourth proportional to 2,113.10, 3,169.65 and 1,378.70 is: 2,068.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,113.10 : 3,169.65 = 1,378.70 : x
  2. Step 2: Convert to fraction form
    2,113.10/3,169.65 = 1,378.70/x
  3. Step 3: Cross multiply
    2,113.10x = 3,169.65 × 1,378.70
  4. Step 4: Simplify right side
    2,113.10x = 4,369,996.46
  5. Step 5: Solve for x
    x = 4,369,996.46/2,113.10
  6. Step 6: Final answer
    x = 2,068.05

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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.