Home / 21,099.90-29,121.44-12,152.58

Finding the Fourth Proportional to 21,099.90, 29,121.44 and 12,152.58

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Solution

The fourth proportional to 21,099.90, 29,121.44 and 12,152.58 is: 16,772.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,099.90 : 29,121.44 = 12,152.58 : x
  2. Step 2: Convert to fraction form
    21,099.90/29,121.44 = 12,152.58/x
  3. Step 3: Cross multiply
    21,099.90x = 29,121.44 × 12,152.58
  4. Step 4: Simplify right side
    21,099.90x = 353,900,659.70
  5. Step 5: Solve for x
    x = 353,900,659.70/21,099.90
  6. Step 6: Final answer
    x = 16,772.62

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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.