Home / 7,913.45-10,920.78-4,376.79

Finding the Fourth Proportional to 7,913.45, 10,920.78 and 4,376.79

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Solution

The fourth proportional to 7,913.45, 10,920.78 and 4,376.79 is: 6,040.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,913.45 : 10,920.78 = 4,376.79 : x
  2. Step 2: Convert to fraction form
    7,913.45/10,920.78 = 4,376.79/x
  3. Step 3: Cross multiply
    7,913.45x = 10,920.78 × 4,376.79
  4. Step 4: Simplify right side
    7,913.45x = 47,797,960.70
  5. Step 5: Solve for x
    x = 47,797,960.70/7,913.45
  6. Step 6: Final answer
    x = 6,040.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.