Home / 21,845.18-30,143.30-12,283.74

Finding the Fourth Proportional to 21,845.18, 30,143.30 and 12,283.74

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Solution

The fourth proportional to 21,845.18, 30,143.30 and 12,283.74 is: 16,949.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,845.18 : 30,143.30 = 12,283.74 : x
  2. Step 2: Convert to fraction form
    21,845.18/30,143.30 = 12,283.74/x
  3. Step 3: Cross multiply
    21,845.18x = 30,143.30 × 12,283.74
  4. Step 4: Simplify right side
    21,845.18x = 370,272,459.94
  5. Step 5: Solve for x
    x = 370,272,459.94/21,845.18
  6. Step 6: Final answer
    x = 16,949.85

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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.