Home / 21,114.19-31,720.56-18,161.74

Finding the Fourth Proportional to 21,114.19, 31,720.56 and 18,161.74

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Solution

The fourth proportional to 21,114.19, 31,720.56 and 18,161.74 is: 27,284.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,114.19 : 31,720.56 = 18,161.74 : x
  2. Step 2: Convert to fraction form
    21,114.19/31,720.56 = 18,161.74/x
  3. Step 3: Cross multiply
    21,114.19x = 31,720.56 × 18,161.74
  4. Step 4: Simplify right side
    21,114.19x = 576,100,563.37
  5. Step 5: Solve for x
    x = 576,100,563.37/21,114.19
  6. Step 6: Final answer
    x = 27,284.99

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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.