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Finding the Third Proportional to 18,438,530 and 39,831,358

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Solution

The third proportional to 18,438,530 and 39,831,358 is: 86,044,661.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,438,530 : 39,831,358 = 39,831,358 : x
  2. Step 2: Convert to fraction form
    18,438,530/39,831,358 = 39,831,358/x
  3. Step 3: Cross multiply
    18,438,530x = 39,831,358 × 39,831,358
  4. Step 4: Simplify right side
    18,438,530x = 1,586,537,080,124,164
  5. Step 5: Solve for x
    x = 1,586,537,080,124,164/18,438,530
  6. Step 6: Final answer
    x = 86,044,661.92

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.