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Finding the Fourth Proportional to 14,910.83, 20,578.89 and 9,621.03

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Solution

The fourth proportional to 14,910.83, 20,578.89 and 9,621.03 is: 13,278.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,910.83 : 20,578.89 = 9,621.03 : x
  2. Step 2: Convert to fraction form
    14,910.83/20,578.89 = 9,621.03/x
  3. Step 3: Cross multiply
    14,910.83x = 20,578.89 × 9,621.03
  4. Step 4: Simplify right side
    14,910.83x = 197,990,118.06
  5. Step 5: Solve for x
    x = 197,990,118.06/14,910.83
  6. Step 6: Final answer
    x = 13,278.28

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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.