Home / 20,975.38-28,939.50-11,899.24

Finding the Fourth Proportional to 20,975.38, 28,939.50 and 11,899.24

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Solution

The fourth proportional to 20,975.38, 28,939.50 and 11,899.24 is: 16,417.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,975.38 : 28,939.50 = 11,899.24 : x
  2. Step 2: Convert to fraction form
    20,975.38/28,939.50 = 11,899.24/x
  3. Step 3: Cross multiply
    20,975.38x = 28,939.50 × 11,899.24
  4. Step 4: Simplify right side
    20,975.38x = 344,358,055.98
  5. Step 5: Solve for x
    x = 344,358,055.98/20,975.38
  6. Step 6: Final answer
    x = 16,417.25

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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.