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Finding the Fourth Proportional to 12,009.60, 17,990.52 and 9,400.32

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Solution

The fourth proportional to 12,009.60, 17,990.52 and 9,400.32 is: 14,081.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,009.60 : 17,990.52 = 9,400.32 : x
  2. Step 2: Convert to fraction form
    12,009.60/17,990.52 = 9,400.32/x
  3. Step 3: Cross multiply
    12,009.60x = 17,990.52 × 9,400.32
  4. Step 4: Simplify right side
    12,009.60x = 169,116,644.97
  5. Step 5: Solve for x
    x = 169,116,644.97/12,009.60
  6. Step 6: Final answer
    x = 14,081.79

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1.5x scale

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.