Home / 20,405,966.64-28,158,942.12-11,238,609.36

Finding the Fourth Proportional to 20,405,966.64, 28,158,942.12 and 11,238,609.36

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Solution

The fourth proportional to 20,405,966.64, 28,158,942.12 and 11,238,609.36 is: 15,508,569.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,405,966.64 : 28,158,942.12 = 11,238,609.36 : x
  2. Step 2: Convert to fraction form
    20,405,966.64/28,158,942.12 = 11,238,609.36/x
  3. Step 3: Cross multiply
    20,405,966.64x = 28,158,942.12 × 11,238,609.36
  4. Step 4: Simplify right side
    20,405,966.64x = 316,467,350,477,530.25
  5. Step 5: Solve for x
    x = 316,467,350,477,530.25/20,405,966.64
  6. Step 6: Final answer
    x = 15,508,569.43

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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.