Home / 6,861.12-10,290.80-1,931.12

Finding the Fourth Proportional to 6,861.12, 10,290.80 and 1,931.12

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Solution

The fourth proportional to 6,861.12, 10,290.80 and 1,931.12 is: 2,896.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,861.12 : 10,290.80 = 1,931.12 : x
  2. Step 2: Convert to fraction form
    6,861.12/10,290.80 = 1,931.12/x
  3. Step 3: Cross multiply
    6,861.12x = 10,290.80 × 1,931.12
  4. Step 4: Simplify right side
    6,861.12x = 19,872,769.70
  5. Step 5: Solve for x
    x = 19,872,769.70/6,861.12
  6. Step 6: Final answer
    x = 2,896.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.