Home / 28,719.88-39,630.78-16,618.48

Finding the Fourth Proportional to 28,719.88, 39,630.78 and 16,618.48

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Solution

The fourth proportional to 28,719.88, 39,630.78 and 16,618.48 is: 22,931.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,719.88 : 39,630.78 = 16,618.48 : x
  2. Step 2: Convert to fraction form
    28,719.88/39,630.78 = 16,618.48/x
  3. Step 3: Cross multiply
    28,719.88x = 39,630.78 × 16,618.48
  4. Step 4: Simplify right side
    28,719.88x = 658,603,324.81
  5. Step 5: Solve for x
    x = 658,603,324.81/28,719.88
  6. Step 6: Final answer
    x = 22,931.97

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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.