Home / 20,568.74-28,357.42-15,442.56

Finding the Fourth Proportional to 20,568.74, 28,357.42 and 15,442.56

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Solution

The fourth proportional to 20,568.74, 28,357.42 and 15,442.56 is: 21,290.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,568.74 : 28,357.42 = 15,442.56 : x
  2. Step 2: Convert to fraction form
    20,568.74/28,357.42 = 15,442.56/x
  3. Step 3: Cross multiply
    20,568.74x = 28,357.42 × 15,442.56
  4. Step 4: Simplify right side
    20,568.74x = 437,911,159.80
  5. Step 5: Solve for x
    x = 437,911,159.80/20,568.74
  6. Step 6: Final answer
    x = 21,290.13

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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.