Home / 21,512.34-29,687.22-13,011.66

Finding the Fourth Proportional to 21,512.34, 29,687.22 and 13,011.66

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Solution

The fourth proportional to 21,512.34, 29,687.22 and 13,011.66 is: 17,956.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,512.34 : 29,687.22 = 13,011.66 : x
  2. Step 2: Convert to fraction form
    21,512.34/29,687.22 = 13,011.66/x
  3. Step 3: Cross multiply
    21,512.34x = 29,687.22 × 13,011.66
  4. Step 4: Simplify right side
    21,512.34x = 386,280,012.99
  5. Step 5: Solve for x
    x = 386,280,012.99/21,512.34
  6. Step 6: Final answer
    x = 17,956.21

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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.