Home / 21,031.12-29,022.73-12,081.43

Finding the Fourth Proportional to 21,031.12, 29,022.73 and 12,081.43

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Solution

The fourth proportional to 21,031.12, 29,022.73 and 12,081.43 is: 16,672.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,031.12 : 29,022.73 = 12,081.43 : x
  2. Step 2: Convert to fraction form
    21,031.12/29,022.73 = 12,081.43/x
  3. Step 3: Cross multiply
    21,031.12x = 29,022.73 × 12,081.43
  4. Step 4: Simplify right side
    21,031.12x = 350,636,080.90
  5. Step 5: Solve for x
    x = 350,636,080.90/21,031.12
  6. Step 6: Final answer
    x = 16,672.25

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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.