Home / 28,204.78-38,923.86-15,628.72

Finding the Fourth Proportional to 28,204.78, 38,923.86 and 15,628.72

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Solution

The fourth proportional to 28,204.78, 38,923.86 and 15,628.72 is: 21,568.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,204.78 : 38,923.86 = 15,628.72 : x
  2. Step 2: Convert to fraction form
    28,204.78/38,923.86 = 15,628.72/x
  3. Step 3: Cross multiply
    28,204.78x = 38,923.86 × 15,628.72
  4. Step 4: Simplify right side
    28,204.78x = 608,330,109.26
  5. Step 5: Solve for x
    x = 608,330,109.26/28,204.78
  6. Step 6: Final answer
    x = 21,568.33

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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.