Home / 6,920.47-10,378.79-1,921.70

Finding the Fourth Proportional to 6,920.47, 10,378.79 and 1,921.70

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Solution

The fourth proportional to 6,920.47, 10,378.79 and 1,921.70 is: 2,882.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,920.47 : 10,378.79 = 1,921.70 : x
  2. Step 2: Convert to fraction form
    6,920.47/10,378.79 = 1,921.70/x
  3. Step 3: Cross multiply
    6,920.47x = 10,378.79 × 1,921.70
  4. Step 4: Simplify right side
    6,920.47x = 19,944,920.74
  5. Step 5: Solve for x
    x = 19,944,920.74/6,920.47
  6. Step 6: Final answer
    x = 2,882.02

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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.