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Finding the Fourth Proportional to 7,923.80, 10,955.72 and 6,939.65

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Solution

The fourth proportional to 7,923.80, 10,955.72 and 6,939.65 is: 9,595.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,923.80 : 10,955.72 = 6,939.65 : x
  2. Step 2: Convert to fraction form
    7,923.80/10,955.72 = 6,939.65/x
  3. Step 3: Cross multiply
    7,923.80x = 10,955.72 × 6,939.65
  4. Step 4: Simplify right side
    7,923.80x = 76,028,862.30
  5. Step 5: Solve for x
    x = 76,028,862.30/7,923.80
  6. Step 6: Final answer
    x = 9,595.00

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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.