Home / 21,215.97-31,775.48-10,130.42

Finding the Fourth Proportional to 21,215.97, 31,775.48 and 10,130.42

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Solution

The fourth proportional to 21,215.97, 31,775.48 and 10,130.42 is: 15,172.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,215.97 : 31,775.48 = 10,130.42 : x
  2. Step 2: Convert to fraction form
    21,215.97/31,775.48 = 10,130.42/x
  3. Step 3: Cross multiply
    21,215.97x = 31,775.48 × 10,130.42
  4. Step 4: Simplify right side
    21,215.97x = 321,898,867.73
  5. Step 5: Solve for x
    x = 321,898,867.73/21,215.97
  6. Step 6: Final answer
    x = 15,172.48

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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.