Home / 20,988,432-31,411,540.38-12,906,526.56

Finding the Fourth Proportional to 20,988,432, 31,411,540.38 and 12,906,526.56

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Solution

The fourth proportional to 20,988,432, 31,411,540.38 and 12,906,526.56 is: 19,316,063.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,988,432 : 31,411,540.38 = 12,906,526.56 : x
  2. Step 2: Convert to fraction form
    20,988,432/31,411,540.38 = 12,906,526.56/x
  3. Step 3: Cross multiply
    20,988,432x = 31,411,540.38 × 12,906,526.56
  4. Step 4: Simplify right side
    20,988,432x = 405,413,880,204,982.50
  5. Step 5: Solve for x
    x = 405,413,880,204,982.50/20,988,432
  6. Step 6: Final answer
    x = 19,316,063.26

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.