Home / 21,126.19-31,720.44-11,784.46

Finding the Fourth Proportional to 21,126.19, 31,720.44 and 11,784.46

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Solution

The fourth proportional to 21,126.19, 31,720.44 and 11,784.46 is: 17,694.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,126.19 : 31,720.44 = 11,784.46 : x
  2. Step 2: Convert to fraction form
    21,126.19/31,720.44 = 11,784.46/x
  3. Step 3: Cross multiply
    21,126.19x = 31,720.44 × 11,784.46
  4. Step 4: Simplify right side
    21,126.19x = 373,808,197.44
  5. Step 5: Solve for x
    x = 373,808,197.44/21,126.19
  6. Step 6: Final answer
    x = 17,694.07

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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.