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Finding the Fourth Proportional to 7,885.80, 10,830.17 and 6,861.80

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Solution

The fourth proportional to 7,885.80, 10,830.17 and 6,861.80 is: 9,423.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,885.80 : 10,830.17 = 6,861.80 : x
  2. Step 2: Convert to fraction form
    7,885.80/10,830.17 = 6,861.80/x
  3. Step 3: Cross multiply
    7,885.80x = 10,830.17 × 6,861.80
  4. Step 4: Simplify right side
    7,885.80x = 74,314,460.51
  5. Step 5: Solve for x
    x = 74,314,460.51/7,885.80
  6. Step 6: Final answer
    x = 9,423.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.