Home / 28,918.71-39,900.51-16,979.72

Finding the Fourth Proportional to 28,918.71, 39,900.51 and 16,979.72

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Solution

The fourth proportional to 28,918.71, 39,900.51 and 16,979.72 is: 23,427.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,918.71 : 39,900.51 = 16,979.72 : x
  2. Step 2: Convert to fraction form
    28,918.71/39,900.51 = 16,979.72/x
  3. Step 3: Cross multiply
    28,918.71x = 39,900.51 × 16,979.72
  4. Step 4: Simplify right side
    28,918.71x = 677,499,288.15
  5. Step 5: Solve for x
    x = 677,499,288.15/28,918.71
  6. Step 6: Final answer
    x = 23,427.71

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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.