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Finding the Fourth Proportional to 8,418.80, 12,624 and 4,910.01

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Solution

The fourth proportional to 8,418.80, 12,624 and 4,910.01 is: 7,362.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,418.80 : 12,624 = 4,910.01 : x
  2. Step 2: Convert to fraction form
    8,418.80/12,624 = 4,910.01/x
  3. Step 3: Cross multiply
    8,418.80x = 12,624 × 4,910.01
  4. Step 4: Simplify right side
    8,418.80x = 61,983,966.24
  5. Step 5: Solve for x
    x = 61,983,966.24/8,418.80
  6. Step 6: Final answer
    x = 7,362.57

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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.