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Finding the Fourth Proportional to 6,981.40, 10,493.70 and 6,851.80

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Solution

The fourth proportional to 6,981.40, 10,493.70 and 6,851.80 is: 10,298.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,981.40 : 10,493.70 = 6,851.80 : x
  2. Step 2: Convert to fraction form
    6,981.40/10,493.70 = 6,851.80/x
  3. Step 3: Cross multiply
    6,981.40x = 10,493.70 × 6,851.80
  4. Step 4: Simplify right side
    6,981.40x = 71,900,733.66
  5. Step 5: Solve for x
    x = 71,900,733.66/6,981.40
  6. Step 6: Final answer
    x = 10,298.90

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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.