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Finding the Fourth Proportional to 12,859.08, 17,742.21 and 8,079.77

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Solution

The fourth proportional to 12,859.08, 17,742.21 and 8,079.77 is: 11,148.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,859.08 : 17,742.21 = 8,079.77 : x
  2. Step 2: Convert to fraction form
    12,859.08/17,742.21 = 8,079.77/x
  3. Step 3: Cross multiply
    12,859.08x = 17,742.21 × 8,079.77
  4. Step 4: Simplify right side
    12,859.08x = 143,352,990.15
  5. Step 5: Solve for x
    x = 143,352,990.15/12,859.08
  6. Step 6: Final answer
    x = 11,148.00

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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.