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Finding the Fourth Proportional to 11,681.70, 16,120.74 and 6,376.50

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Solution

The fourth proportional to 11,681.70, 16,120.74 and 6,376.50 is: 8,799.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,681.70 : 16,120.74 = 6,376.50 : x
  2. Step 2: Convert to fraction form
    11,681.70/16,120.74 = 6,376.50/x
  3. Step 3: Cross multiply
    11,681.70x = 16,120.74 × 6,376.50
  4. Step 4: Simplify right side
    11,681.70x = 102,793,898.61
  5. Step 5: Solve for x
    x = 102,793,898.61/11,681.70
  6. Step 6: Final answer
    x = 8,799.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.