Home / 28,163.20-38,867.84-15,590.40

Finding the Fourth Proportional to 28,163.20, 38,867.84 and 15,590.40

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Solution

The fourth proportional to 28,163.20, 38,867.84 and 15,590.40 is: 21,516.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,163.20 : 38,867.84 = 15,590.40 : x
  2. Step 2: Convert to fraction form
    28,163.20/38,867.84 = 15,590.40/x
  3. Step 3: Cross multiply
    28,163.20x = 38,867.84 × 15,590.40
  4. Step 4: Simplify right side
    28,163.20x = 605,965,172.74
  5. Step 5: Solve for x
    x = 605,965,172.74/28,163.20
  6. Step 6: Final answer
    x = 21,516.20

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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.