Home / 12,190.16-16,806.76-9,999.28

Finding the Fourth Proportional to 12,190.16, 16,806.76 and 9,999.28

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Solution

The fourth proportional to 12,190.16, 16,806.76 and 9,999.28 is: 13,786.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,190.16 : 16,806.76 = 9,999.28 : x
  2. Step 2: Convert to fraction form
    12,190.16/16,806.76 = 9,999.28/x
  3. Step 3: Cross multiply
    12,190.16x = 16,806.76 × 9,999.28
  4. Step 4: Simplify right side
    12,190.16x = 168,055,499.13
  5. Step 5: Solve for x
    x = 168,055,499.13/12,190.16
  6. Step 6: Final answer
    x = 13,786.16

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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.