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Finding the Fourth Proportional to 12,695.81, 17,508.74 and 8,214.89

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Solution

The fourth proportional to 12,695.81, 17,508.74 and 8,214.89 is: 11,329.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,695.81 : 17,508.74 = 8,214.89 : x
  2. Step 2: Convert to fraction form
    12,695.81/17,508.74 = 8,214.89/x
  3. Step 3: Cross multiply
    12,695.81x = 17,508.74 × 8,214.89
  4. Step 4: Simplify right side
    12,695.81x = 143,832,244.52
  5. Step 5: Solve for x
    x = 143,832,244.52/12,695.81
  6. Step 6: Final answer
    x = 11,329.12

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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.