Home / 28,202.45-38,919.78-15,455.43

Finding the Fourth Proportional to 28,202.45, 38,919.78 and 15,455.43

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Solution

The fourth proportional to 28,202.45, 38,919.78 and 15,455.43 is: 21,328.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,202.45 : 38,919.78 = 15,455.43 : x
  2. Step 2: Convert to fraction form
    28,202.45/38,919.78 = 15,455.43/x
  3. Step 3: Cross multiply
    28,202.45x = 38,919.78 × 15,455.43
  4. Step 4: Simplify right side
    28,202.45x = 601,521,935.41
  5. Step 5: Solve for x
    x = 601,521,935.41/28,202.45
  6. Step 6: Final answer
    x = 21,328.72

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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.