Home / 21,990.06-30,346.16-11,918.52

Finding the Fourth Proportional to 21,990.06, 30,346.16 and 11,918.52

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Solution

The fourth proportional to 21,990.06, 30,346.16 and 11,918.52 is: 16,447.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,990.06 : 30,346.16 = 11,918.52 : x
  2. Step 2: Convert to fraction form
    21,990.06/30,346.16 = 11,918.52/x
  3. Step 3: Cross multiply
    21,990.06x = 30,346.16 × 11,918.52
  4. Step 4: Simplify right side
    21,990.06x = 361,681,255.29
  5. Step 5: Solve for x
    x = 361,681,255.29/21,990.06
  6. Step 6: Final answer
    x = 16,447.49

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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.