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Finding the Fourth Proportional to 10,989.58, 15,165.63 and 6,021.58

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Solution

The fourth proportional to 10,989.58, 15,165.63 and 6,021.58 is: 8,309.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,989.58 : 15,165.63 = 6,021.58 : x
  2. Step 2: Convert to fraction form
    10,989.58/15,165.63 = 6,021.58/x
  3. Step 3: Cross multiply
    10,989.58x = 15,165.63 × 6,021.58
  4. Step 4: Simplify right side
    10,989.58x = 91,321,054.30
  5. Step 5: Solve for x
    x = 91,321,054.30/10,989.58
  6. Step 6: Final answer
    x = 8,309.79

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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.