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Finding the Fourth Proportional to 6,861.80, 10,292.70 and 5,133.80

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Solution

The fourth proportional to 6,861.80, 10,292.70 and 5,133.80 is: 7,700.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,861.80 : 10,292.70 = 5,133.80 : x
  2. Step 2: Convert to fraction form
    6,861.80/10,292.70 = 5,133.80/x
  3. Step 3: Cross multiply
    6,861.80x = 10,292.70 × 5,133.80
  4. Step 4: Simplify right side
    6,861.80x = 52,840,663.26
  5. Step 5: Solve for x
    x = 52,840,663.26/6,861.80
  6. Step 6: Final answer
    x = 7,700.70

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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.