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Finding the Fourth Proportional to 14,418.96, 21,621.06 and 6,621

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Solution

The fourth proportional to 14,418.96, 21,621.06 and 6,621 is: 9,928.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,418.96 : 21,621.06 = 6,621 : x
  2. Step 2: Convert to fraction form
    14,418.96/21,621.06 = 6,621/x
  3. Step 3: Cross multiply
    14,418.96x = 21,621.06 × 6,621
  4. Step 4: Simplify right side
    14,418.96x = 143,153,038.26
  5. Step 5: Solve for x
    x = 143,153,038.26/14,418.96
  6. Step 6: Final answer
    x = 9,928.11

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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.