Home / 28,154.70-38,851.68-15,579.42

Finding the Fourth Proportional to 28,154.70, 38,851.68 and 15,579.42

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Solution

The fourth proportional to 28,154.70, 38,851.68 and 15,579.42 is: 21,498.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,154.70 : 38,851.68 = 15,579.42 : x
  2. Step 2: Convert to fraction form
    28,154.70/38,851.68 = 15,579.42/x
  3. Step 3: Cross multiply
    28,154.70x = 38,851.68 × 15,579.42
  4. Step 4: Simplify right side
    28,154.70x = 605,286,640.43
  5. Step 5: Solve for x
    x = 605,286,640.43/28,154.70
  6. Step 6: Final answer
    x = 21,498.60

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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.