Home / 20,982.30-28,955.61-11,422.14

Finding the Fourth Proportional to 20,982.30, 28,955.61 and 11,422.14

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Solution

The fourth proportional to 20,982.30, 28,955.61 and 11,422.14 is: 15,762.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,982.30 : 28,955.61 = 11,422.14 : x
  2. Step 2: Convert to fraction form
    20,982.30/28,955.61 = 11,422.14/x
  3. Step 3: Cross multiply
    20,982.30x = 28,955.61 × 11,422.14
  4. Step 4: Simplify right side
    20,982.30x = 330,735,031.21
  5. Step 5: Solve for x
    x = 330,735,031.21/20,982.30
  6. Step 6: Final answer
    x = 15,762.57

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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.