Home / 20,047.67-27,666.24-12,986.38

Finding the Fourth Proportional to 20,047.67, 27,666.24 and 12,986.38

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Solution

The fourth proportional to 20,047.67, 27,666.24 and 12,986.38 is: 17,921.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,047.67 : 27,666.24 = 12,986.38 : x
  2. Step 2: Convert to fraction form
    20,047.67/27,666.24 = 12,986.38/x
  3. Step 3: Cross multiply
    20,047.67x = 27,666.24 × 12,986.38
  4. Step 4: Simplify right side
    20,047.67x = 359,284,305.81
  5. Step 5: Solve for x
    x = 359,284,305.81/20,047.67
  6. Step 6: Final answer
    x = 17,921.50

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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.