Home / 21,114.89-29,138.91-11,555.61

Finding the Fourth Proportional to 21,114.89, 29,138.91 and 11,555.61

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Solution

The fourth proportional to 21,114.89, 29,138.91 and 11,555.61 is: 15,946.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,114.89 : 29,138.91 = 11,555.61 : x
  2. Step 2: Convert to fraction form
    21,114.89/29,138.91 = 11,555.61/x
  3. Step 3: Cross multiply
    21,114.89x = 29,138.91 × 11,555.61
  4. Step 4: Simplify right side
    21,114.89x = 336,717,879.79
  5. Step 5: Solve for x
    x = 336,717,879.79/21,114.89
  6. Step 6: Final answer
    x = 15,946.94

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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.