Home / 12,188.48-18,290.41-6,645.31

Finding the Fourth Proportional to 12,188.48, 18,290.41 and 6,645.31

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Solution

The fourth proportional to 12,188.48, 18,290.41 and 6,645.31 is: 9,972.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,188.48 : 18,290.41 = 6,645.31 : x
  2. Step 2: Convert to fraction form
    12,188.48/18,290.41 = 6,645.31/x
  3. Step 3: Cross multiply
    12,188.48x = 18,290.41 × 6,645.31
  4. Step 4: Simplify right side
    12,188.48x = 121,545,382.14
  5. Step 5: Solve for x
    x = 121,545,382.14/12,188.48
  6. Step 6: Final answer
    x = 9,972.16

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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.