Home / 6,140.45-9,212.70-1,981.10

Finding the Fourth Proportional to 6,140.45, 9,212.70 and 1,981.10

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Solution

The fourth proportional to 6,140.45, 9,212.70 and 1,981.10 is: 2,972.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,140.45 : 9,212.70 = 1,981.10 : x
  2. Step 2: Convert to fraction form
    6,140.45/9,212.70 = 1,981.10/x
  3. Step 3: Cross multiply
    6,140.45x = 9,212.70 × 1,981.10
  4. Step 4: Simplify right side
    6,140.45x = 18,251,279.97
  5. Step 5: Solve for x
    x = 18,251,279.97/6,140.45
  6. Step 6: Final answer
    x = 2,972.30

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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.