Home / 21,822.89-30,113.07-12,261.48

Finding the Fourth Proportional to 21,822.89, 30,113.07 and 12,261.48

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Solution

The fourth proportional to 21,822.89, 30,113.07 and 12,261.48 is: 16,919.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,822.89 : 30,113.07 = 12,261.48 : x
  2. Step 2: Convert to fraction form
    21,822.89/30,113.07 = 12,261.48/x
  3. Step 3: Cross multiply
    21,822.89x = 30,113.07 × 12,261.48
  4. Step 4: Simplify right side
    21,822.89x = 369,230,646.64
  5. Step 5: Solve for x
    x = 369,230,646.64/21,822.89
  6. Step 6: Final answer
    x = 16,919.42

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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.