Home / 21,126.31-31,720.62-11,784.58

Finding the Fourth Proportional to 21,126.31, 31,720.62 and 11,784.58

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Solution

The fourth proportional to 21,126.31, 31,720.62 and 11,784.58 is: 17,694.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,126.31 : 31,720.62 = 11,784.58 : x
  2. Step 2: Convert to fraction form
    21,126.31/31,720.62 = 11,784.58/x
  3. Step 3: Cross multiply
    21,126.31x = 31,720.62 × 11,784.58
  4. Step 4: Simplify right side
    21,126.31x = 373,814,184.04
  5. Step 5: Solve for x
    x = 373,814,184.04/21,126.31
  6. Step 6: Final answer
    x = 17,694.25

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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.