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Finding the Fourth Proportional to 11,710.90, 16,161.06 and 6,405.76

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Solution

The fourth proportional to 11,710.90, 16,161.06 and 6,405.76 is: 8,839.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,710.90 : 16,161.06 = 6,405.76 : x
  2. Step 2: Convert to fraction form
    11,710.90/16,161.06 = 6,405.76/x
  3. Step 3: Cross multiply
    11,710.90x = 16,161.06 × 6,405.76
  4. Step 4: Simplify right side
    11,710.90x = 103,523,871.71
  5. Step 5: Solve for x
    x = 103,523,871.71/11,710.90
  6. Step 6: Final answer
    x = 8,839.96

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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.