Home / 6,861.12-10,291.68-1,931.20

Finding the Fourth Proportional to 6,861.12, 10,291.68 and 1,931.20

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Solution

The fourth proportional to 6,861.12, 10,291.68 and 1,931.20 is: 2,896.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,861.12 : 10,291.68 = 1,931.20 : x
  2. Step 2: Convert to fraction form
    6,861.12/10,291.68 = 1,931.20/x
  3. Step 3: Cross multiply
    6,861.12x = 10,291.68 × 1,931.20
  4. Step 4: Simplify right side
    6,861.12x = 19,875,292.42
  5. Step 5: Solve for x
    x = 19,875,292.42/6,861.12
  6. Step 6: Final answer
    x = 2,896.80

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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.