Home / 7,964.55-10,990.36-4,378.78

Finding the Fourth Proportional to 7,964.55, 10,990.36 and 4,378.78

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Solution

The fourth proportional to 7,964.55, 10,990.36 and 4,378.78 is: 6,042.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,964.55 : 10,990.36 = 4,378.78 : x
  2. Step 2: Convert to fraction form
    7,964.55/10,990.36 = 4,378.78/x
  3. Step 3: Cross multiply
    7,964.55x = 10,990.36 × 4,378.78
  4. Step 4: Simplify right side
    7,964.55x = 48,124,406.37
  5. Step 5: Solve for x
    x = 48,124,406.37/7,964.55
  6. Step 6: Final answer
    x = 6,042.32

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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.