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Finding the Fourth Proportional to 7,739, 10,679.67 and 4,382.45

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Solution

The fourth proportional to 7,739, 10,679.67 and 4,382.45 is: 6,047.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,739 : 10,679.67 = 4,382.45 : x
  2. Step 2: Convert to fraction form
    7,739/10,679.67 = 4,382.45/x
  3. Step 3: Cross multiply
    7,739x = 10,679.67 × 4,382.45
  4. Step 4: Simplify right side
    7,739x = 46,803,119.79
  5. Step 5: Solve for x
    x = 46,803,119.79/7,739
  6. Step 6: Final answer
    x = 6,047.70

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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.