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Finding the Fourth Proportional to 7,885.89, 11,807.97 and 4,761.72

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Solution

The fourth proportional to 7,885.89, 11,807.97 and 4,761.72 is: 7,129.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,885.89 : 11,807.97 = 4,761.72 : x
  2. Step 2: Convert to fraction form
    7,885.89/11,807.97 = 4,761.72/x
  3. Step 3: Cross multiply
    7,885.89x = 11,807.97 × 4,761.72
  4. Step 4: Simplify right side
    7,885.89x = 56,226,246.91
  5. Step 5: Solve for x
    x = 56,226,246.91/7,885.89
  6. Step 6: Final answer
    x = 7,129.98

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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.