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Finding the Fourth Proportional to 13,612.14, 18,776.61 and 8,567.61

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Solution

The fourth proportional to 13,612.14, 18,776.61 and 8,567.61 is: 11,818.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,612.14 : 18,776.61 = 8,567.61 : x
  2. Step 2: Convert to fraction form
    13,612.14/18,776.61 = 8,567.61/x
  3. Step 3: Cross multiply
    13,612.14x = 18,776.61 × 8,567.61
  4. Step 4: Simplify right side
    13,612.14x = 160,870,534.88
  5. Step 5: Solve for x
    x = 160,870,534.88/13,612.14
  6. Step 6: Final answer
    x = 11,818.17

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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.