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Finding the Fourth Proportional to 11,713.19, 16,164 and 6,407.90

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Solution

The fourth proportional to 11,713.19, 16,164 and 6,407.90 is: 8,842.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,713.19 : 16,164 = 6,407.90 : x
  2. Step 2: Convert to fraction form
    11,713.19/16,164 = 6,407.90/x
  3. Step 3: Cross multiply
    11,713.19x = 16,164 × 6,407.90
  4. Step 4: Simplify right side
    11,713.19x = 103,577,214.78
  5. Step 5: Solve for x
    x = 103,577,214.78/11,713.19
  6. Step 6: Final answer
    x = 8,842.79

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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.