Home / 20,088.75-27,722.45-12,129.39

Finding the Fourth Proportional to 20,088.75, 27,722.45 and 12,129.39

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Solution

The fourth proportional to 20,088.75, 27,722.45 and 12,129.39 is: 16,738.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,088.75 : 27,722.45 = 12,129.39 : x
  2. Step 2: Convert to fraction form
    20,088.75/27,722.45 = 12,129.39/x
  3. Step 3: Cross multiply
    20,088.75x = 27,722.45 × 12,129.39
  4. Step 4: Simplify right side
    20,088.75x = 336,256,347.16
  5. Step 5: Solve for x
    x = 336,256,347.16/20,088.75
  6. Step 6: Final answer
    x = 16,738.54

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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.