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Finding the Fourth Proportional to 45,909.52, 68,855.20 and 12,621

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Solution

The fourth proportional to 45,909.52, 68,855.20 and 12,621 is: 18,929.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,909.52 : 68,855.20 = 12,621 : x
  2. Step 2: Convert to fraction form
    45,909.52/68,855.20 = 12,621/x
  3. Step 3: Cross multiply
    45,909.52x = 68,855.20 × 12,621
  4. Step 4: Simplify right side
    45,909.52x = 869,021,479.20
  5. Step 5: Solve for x
    x = 869,021,479.20/45,909.52
  6. Step 6: Final answer
    x = 18,929.00

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.