Home / 21,862.49-30,169.13-12,430.85

Finding the Fourth Proportional to 21,862.49, 30,169.13 and 12,430.85

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Solution

The fourth proportional to 21,862.49, 30,169.13 and 12,430.85 is: 17,153.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,862.49 : 30,169.13 = 12,430.85 : x
  2. Step 2: Convert to fraction form
    21,862.49/30,169.13 = 12,430.85/x
  3. Step 3: Cross multiply
    21,862.49x = 30,169.13 × 12,430.85
  4. Step 4: Simplify right side
    21,862.49x = 375,027,716.66
  5. Step 5: Solve for x
    x = 375,027,716.66/21,862.49
  6. Step 6: Final answer
    x = 17,153.94

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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.