Home / 21,103.20-29,124.18-12,153.60

Finding the Fourth Proportional to 21,103.20, 29,124.18 and 12,153.60

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Solution

The fourth proportional to 21,103.20, 29,124.18 and 12,153.60 is: 16,772.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,103.20 : 29,124.18 = 12,153.60 : x
  2. Step 2: Convert to fraction form
    21,103.20/29,124.18 = 12,153.60/x
  3. Step 3: Cross multiply
    21,103.20x = 29,124.18 × 12,153.60
  4. Step 4: Simplify right side
    21,103.20x = 353,963,634.05
  5. Step 5: Solve for x
    x = 353,963,634.05/21,103.20
  6. Step 6: Final answer
    x = 16,772.98

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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.