Home / 3,120.48-4,307.15-1,861.13

Finding the Fourth Proportional to 3,120.48, 4,307.15 and 1,861.13

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Solution

The fourth proportional to 3,120.48, 4,307.15 and 1,861.13 is: 2,568.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,120.48 : 4,307.15 = 1,861.13 : x
  2. Step 2: Convert to fraction form
    3,120.48/4,307.15 = 1,861.13/x
  3. Step 3: Cross multiply
    3,120.48x = 4,307.15 × 1,861.13
  4. Step 4: Simplify right side
    3,120.48x = 8,016,166.08
  5. Step 5: Solve for x
    x = 8,016,166.08/3,120.48
  6. Step 6: Final answer
    x = 2,568.89

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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.