Home / 21,105.66-29,124.96-12,153.48

Finding the Fourth Proportional to 21,105.66, 29,124.96 and 12,153.48

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Solution

The fourth proportional to 21,105.66, 29,124.96 and 12,153.48 is: 16,771.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,105.66 : 29,124.96 = 12,153.48 : x
  2. Step 2: Convert to fraction form
    21,105.66/29,124.96 = 12,153.48/x
  3. Step 3: Cross multiply
    21,105.66x = 29,124.96 × 12,153.48
  4. Step 4: Simplify right side
    21,105.66x = 353,969,618.86
  5. Step 5: Solve for x
    x = 353,969,618.86/21,105.66
  6. Step 6: Final answer
    x = 16,771.31

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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.