Home / 21,900.96-30,192.78-15,175.02

Finding the Fourth Proportional to 21,900.96, 30,192.78 and 15,175.02

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Solution

The fourth proportional to 21,900.96, 30,192.78 and 15,175.02 is: 20,920.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,900.96 : 30,192.78 = 15,175.02 : x
  2. Step 2: Convert to fraction form
    21,900.96/30,192.78 = 15,175.02/x
  3. Step 3: Cross multiply
    21,900.96x = 30,192.78 × 15,175.02
  4. Step 4: Simplify right side
    21,900.96x = 458,176,040.36
  5. Step 5: Solve for x
    x = 458,176,040.36/21,900.96
  6. Step 6: Final answer
    x = 20,920.36

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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.