Home / 20,120,706.72-27,785,021.76-12,780,904.68

Finding the Fourth Proportional to 20,120,706.72, 27,785,021.76 and 12,780,904.68

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Solution

The fourth proportional to 20,120,706.72, 27,785,021.76 and 12,780,904.68 is: 17,649,365.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,120,706.72 : 27,785,021.76 = 12,780,904.68 : x
  2. Step 2: Convert to fraction form
    20,120,706.72/27,785,021.76 = 12,780,904.68/x
  3. Step 3: Cross multiply
    20,120,706.72x = 27,785,021.76 × 12,780,904.68
  4. Step 4: Simplify right side
    20,120,706.72x = 355,117,714,646,285.88
  5. Step 5: Solve for x
    x = 355,117,714,646,285.88/20,120,706.72
  6. Step 6: Final answer
    x = 17,649,365.88

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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.