Home / 20,382,921-28,128,627.81-11,215,760.58

Finding the Fourth Proportional to 20,382,921, 28,128,627.81 and 11,215,760.58

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Solution

The fourth proportional to 20,382,921, 28,128,627.81 and 11,215,760.58 is: 15,477,857.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,382,921 : 28,128,627.81 = 11,215,760.58 : x
  2. Step 2: Convert to fraction form
    20,382,921/28,128,627.81 = 11,215,760.58/x
  3. Step 3: Cross multiply
    20,382,921x = 28,128,627.81 × 11,215,760.58
  4. Step 4: Simplify right side
    20,382,921x = 315,483,954,960,889.69
  5. Step 5: Solve for x
    x = 315,483,954,960,889.69/20,382,921
  6. Step 6: Final answer
    x = 15,477,857.91

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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.