Home / 9,989.20-14,979.48-7,682.32

Finding the Fourth Proportional to 9,989.20, 14,979.48 and 7,682.32

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Solution

The fourth proportional to 9,989.20, 14,979.48 and 7,682.32 is: 11,520.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,989.20 : 14,979.48 = 7,682.32 : x
  2. Step 2: Convert to fraction form
    9,989.20/14,979.48 = 7,682.32/x
  3. Step 3: Cross multiply
    9,989.20x = 14,979.48 × 7,682.32
  4. Step 4: Simplify right side
    9,989.20x = 115,077,158.79
  5. Step 5: Solve for x
    x = 115,077,158.79/9,989.20
  6. Step 6: Final answer
    x = 11,520.16

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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.