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Finding the Fourth Proportional to 15,536.86, 21,440.20 and 8,822.86

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Solution

The fourth proportional to 15,536.86, 21,440.20 and 8,822.86 is: 12,175.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,536.86 : 21,440.20 = 8,822.86 : x
  2. Step 2: Convert to fraction form
    15,536.86/21,440.20 = 8,822.86/x
  3. Step 3: Cross multiply
    15,536.86x = 21,440.20 × 8,822.86
  4. Step 4: Simplify right side
    15,536.86x = 189,163,731.66
  5. Step 5: Solve for x
    x = 189,163,731.66/15,536.86
  6. Step 6: Final answer
    x = 12,175.16

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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.