Home / 21,859.49-30,165.02-12,427.85

Finding the Fourth Proportional to 21,859.49, 30,165.02 and 12,427.85

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Solution

The fourth proportional to 21,859.49, 30,165.02 and 12,427.85 is: 17,149.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,859.49 : 30,165.02 = 12,427.85 : x
  2. Step 2: Convert to fraction form
    21,859.49/30,165.02 = 12,427.85/x
  3. Step 3: Cross multiply
    21,859.49x = 30,165.02 × 12,427.85
  4. Step 4: Simplify right side
    21,859.49x = 374,886,224.05
  5. Step 5: Solve for x
    x = 374,886,224.05/21,859.49
  6. Step 6: Final answer
    x = 17,149.82

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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.