Home / 21,199.20-31,802.40-11,335.80

Finding the Fourth Proportional to 21,199.20, 31,802.40 and 11,335.80

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Solution

The fourth proportional to 21,199.20, 31,802.40 and 11,335.80 is: 17,005.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,199.20 : 31,802.40 = 11,335.80 : x
  2. Step 2: Convert to fraction form
    21,199.20/31,802.40 = 11,335.80/x
  3. Step 3: Cross multiply
    21,199.20x = 31,802.40 × 11,335.80
  4. Step 4: Simplify right side
    21,199.20x = 360,505,645.92
  5. Step 5: Solve for x
    x = 360,505,645.92/21,199.20
  6. Step 6: Final answer
    x = 17,005.63

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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.