Home / 21,031.80-28,934.46-20,448.60

Finding the Fourth Proportional to 21,031.80, 28,934.46 and 20,448.60

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Solution

The fourth proportional to 21,031.80, 28,934.46 and 20,448.60 is: 28,132.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,031.80 : 28,934.46 = 20,448.60 : x
  2. Step 2: Convert to fraction form
    21,031.80/28,934.46 = 20,448.60/x
  3. Step 3: Cross multiply
    21,031.80x = 28,934.46 × 20,448.60
  4. Step 4: Simplify right side
    21,031.80x = 591,669,198.76
  5. Step 5: Solve for x
    x = 591,669,198.76/21,031.80
  6. Step 6: Final answer
    x = 28,132.12

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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.