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Finding the Fourth Proportional to 6,904.40, 10,356.60 and 6,861.20

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Solution

The fourth proportional to 6,904.40, 10,356.60 and 6,861.20 is: 10,291.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,904.40 : 10,356.60 = 6,861.20 : x
  2. Step 2: Convert to fraction form
    6,904.40/10,356.60 = 6,861.20/x
  3. Step 3: Cross multiply
    6,904.40x = 10,356.60 × 6,861.20
  4. Step 4: Simplify right side
    6,904.40x = 71,058,703.92
  5. Step 5: Solve for x
    x = 71,058,703.92/6,904.40
  6. Step 6: Final answer
    x = 10,291.80

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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.