Home / 21,119.13-31,665.33-17,986.86

Finding the Fourth Proportional to 21,119.13, 31,665.33 and 17,986.86

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Solution

The fourth proportional to 21,119.13, 31,665.33 and 17,986.86 is: 26,968.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,119.13 : 31,665.33 = 17,986.86 : x
  2. Step 2: Convert to fraction form
    21,119.13/31,665.33 = 17,986.86/x
  3. Step 3: Cross multiply
    21,119.13x = 31,665.33 × 17,986.86
  4. Step 4: Simplify right side
    21,119.13x = 569,559,857.56
  5. Step 5: Solve for x
    x = 569,559,857.56/21,119.13
  6. Step 6: Final answer
    x = 26,968.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.