Home / 7,776.12-10,731-4,239.30

Finding the Fourth Proportional to 7,776.12, 10,731 and 4,239.30

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Solution

The fourth proportional to 7,776.12, 10,731 and 4,239.30 is: 5,850.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,776.12 : 10,731 = 4,239.30 : x
  2. Step 2: Convert to fraction form
    7,776.12/10,731 = 4,239.30/x
  3. Step 3: Cross multiply
    7,776.12x = 10,731 × 4,239.30
  4. Step 4: Simplify right side
    7,776.12x = 45,491,928.30
  5. Step 5: Solve for x
    x = 45,491,928.30/7,776.12
  6. Step 6: Final answer
    x = 5,850.21

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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.