Home / 20,709.72-28,578.96-11,757.06

Finding the Fourth Proportional to 20,709.72, 28,578.96 and 11,757.06

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Solution

The fourth proportional to 20,709.72, 28,578.96 and 11,757.06 is: 16,224.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,709.72 : 28,578.96 = 11,757.06 : x
  2. Step 2: Convert to fraction form
    20,709.72/28,578.96 = 11,757.06/x
  3. Step 3: Cross multiply
    20,709.72x = 28,578.96 × 11,757.06
  4. Step 4: Simplify right side
    20,709.72x = 336,004,547.46
  5. Step 5: Solve for x
    x = 336,004,547.46/20,709.72
  6. Step 6: Final answer
    x = 16,224.49

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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.