Home / 21,821.24-30,113.44-12,261.53

Finding the Fourth Proportional to 21,821.24, 30,113.44 and 12,261.53

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Solution

The fourth proportional to 21,821.24, 30,113.44 and 12,261.53 is: 16,920.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,821.24 : 30,113.44 = 12,261.53 : x
  2. Step 2: Convert to fraction form
    21,821.24/30,113.44 = 12,261.53/x
  3. Step 3: Cross multiply
    21,821.24x = 30,113.44 × 12,261.53
  4. Step 4: Simplify right side
    21,821.24x = 369,236,892.59
  5. Step 5: Solve for x
    x = 369,236,892.59/21,821.24
  6. Step 6: Final answer
    x = 16,920.98

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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.