Home / 5,205.47-7,812.32-1,920.88

Finding the Fourth Proportional to 5,205.47, 7,812.32 and 1,920.88

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Solution

The fourth proportional to 5,205.47, 7,812.32 and 1,920.88 is: 2,882.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,205.47 : 7,812.32 = 1,920.88 : x
  2. Step 2: Convert to fraction form
    5,205.47/7,812.32 = 1,920.88/x
  3. Step 3: Cross multiply
    5,205.47x = 7,812.32 × 1,920.88
  4. Step 4: Simplify right side
    5,205.47x = 15,006,529.40
  5. Step 5: Solve for x
    x = 15,006,529.40/5,205.47
  6. Step 6: Final answer
    x = 2,882.84

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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.