Home / 21,827.31-30,119.90-12,397.29

Finding the Fourth Proportional to 21,827.31, 30,119.90 and 12,397.29

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Solution

The fourth proportional to 21,827.31, 30,119.90 and 12,397.29 is: 17,107.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,827.31 : 30,119.90 = 12,397.29 : x
  2. Step 2: Convert to fraction form
    21,827.31/30,119.90 = 12,397.29/x
  3. Step 3: Cross multiply
    21,827.31x = 30,119.90 × 12,397.29
  4. Step 4: Simplify right side
    21,827.31x = 373,405,073.08
  5. Step 5: Solve for x
    x = 373,405,073.08/21,827.31
  6. Step 6: Final answer
    x = 17,107.24

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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.