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Finding the Fourth Proportional to 20,466, 28,234.98 and 12,909.51

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Solution

The fourth proportional to 20,466, 28,234.98 and 12,909.51 is: 17,810.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,466 : 28,234.98 = 12,909.51 : x
  2. Step 2: Convert to fraction form
    20,466/28,234.98 = 12,909.51/x
  3. Step 3: Cross multiply
    20,466x = 28,234.98 × 12,909.51
  4. Step 4: Simplify right side
    20,466x = 364,499,756.66
  5. Step 5: Solve for x
    x = 364,499,756.66/20,466
  6. Step 6: Final answer
    x = 17,810.01

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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.