Home / 21,215.75-31,775.17-10,130.24

Finding the Fourth Proportional to 21,215.75, 31,775.17 and 10,130.24

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Solution

The fourth proportional to 21,215.75, 31,775.17 and 10,130.24 is: 15,172.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,215.75 : 31,775.17 = 10,130.24 : x
  2. Step 2: Convert to fraction form
    21,215.75/31,775.17 = 10,130.24/x
  3. Step 3: Cross multiply
    21,215.75x = 31,775.17 × 10,130.24
  4. Step 4: Simplify right side
    21,215.75x = 321,890,124.62
  5. Step 5: Solve for x
    x = 321,890,124.62/21,215.75
  6. Step 6: Final answer
    x = 15,172.23

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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.