Home / 21,259.82-29,334.10-12,306.78

Finding the Fourth Proportional to 21,259.82, 29,334.10 and 12,306.78

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Solution

The fourth proportional to 21,259.82, 29,334.10 and 12,306.78 is: 16,980.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,259.82 : 29,334.10 = 12,306.78 : x
  2. Step 2: Convert to fraction form
    21,259.82/29,334.10 = 12,306.78/x
  3. Step 3: Cross multiply
    21,259.82x = 29,334.10 × 12,306.78
  4. Step 4: Simplify right side
    21,259.82x = 361,008,315.20
  5. Step 5: Solve for x
    x = 361,008,315.20/21,259.82
  6. Step 6: Final answer
    x = 16,980.78

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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.