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Finding the Fourth Proportional to 12,811.72, 17,684.58 and 7,508.32

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Solution

The fourth proportional to 12,811.72, 17,684.58 and 7,508.32 is: 10,364.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,811.72 : 17,684.58 = 7,508.32 : x
  2. Step 2: Convert to fraction form
    12,811.72/17,684.58 = 7,508.32/x
  3. Step 3: Cross multiply
    12,811.72x = 17,684.58 × 7,508.32
  4. Step 4: Simplify right side
    12,811.72x = 132,781,485.71
  5. Step 5: Solve for x
    x = 132,781,485.71/12,811.72
  6. Step 6: Final answer
    x = 10,364.06

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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.