Home / 20,157.72-27,817.69-11,205.15

Finding the Fourth Proportional to 20,157.72, 27,817.69 and 11,205.15

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Solution

The fourth proportional to 20,157.72, 27,817.69 and 11,205.15 is: 15,463.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,157.72 : 27,817.69 = 11,205.15 : x
  2. Step 2: Convert to fraction form
    20,157.72/27,817.69 = 11,205.15/x
  3. Step 3: Cross multiply
    20,157.72x = 27,817.69 × 11,205.15
  4. Step 4: Simplify right side
    20,157.72x = 311,701,332.66
  5. Step 5: Solve for x
    x = 311,701,332.66/20,157.72
  6. Step 6: Final answer
    x = 15,463.12

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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.