Home / 6,911.40-10,367.10-1,981.20

Finding the Fourth Proportional to 6,911.40, 10,367.10 and 1,981.20

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Solution

The fourth proportional to 6,911.40, 10,367.10 and 1,981.20 is: 2,971.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,911.40 : 10,367.10 = 1,981.20 : x
  2. Step 2: Convert to fraction form
    6,911.40/10,367.10 = 1,981.20/x
  3. Step 3: Cross multiply
    6,911.40x = 10,367.10 × 1,981.20
  4. Step 4: Simplify right side
    6,911.40x = 20,539,298.52
  5. Step 5: Solve for x
    x = 20,539,298.52/6,911.40
  6. Step 6: Final answer
    x = 2,971.80

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Double scale
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Similar ratio
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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.