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Finding the Fourth Proportional to 9,986.20, 14,977.20 and 5,051.20

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Solution

The fourth proportional to 9,986.20, 14,977.20 and 5,051.20 is: 7,575.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,986.20 : 14,977.20 = 5,051.20 : x
  2. Step 2: Convert to fraction form
    9,986.20/14,977.20 = 5,051.20/x
  3. Step 3: Cross multiply
    9,986.20x = 14,977.20 × 5,051.20
  4. Step 4: Simplify right side
    9,986.20x = 75,652,832.64
  5. Step 5: Solve for x
    x = 75,652,832.64/9,986.20
  6. Step 6: Final answer
    x = 7,575.74

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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.