Home / 20,988,431-31,411,538.88-12,906,525.56

Finding the Fourth Proportional to 20,988,431, 31,411,538.88 and 12,906,525.56

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Solution

The fourth proportional to 20,988,431, 31,411,538.88 and 12,906,525.56 is: 19,316,061.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,988,431 : 31,411,538.88 = 12,906,525.56 : x
  2. Step 2: Convert to fraction form
    20,988,431/31,411,538.88 = 12,906,525.56/x
  3. Step 3: Cross multiply
    20,988,431x = 31,411,538.88 × 12,906,525.56
  4. Step 4: Simplify right side
    20,988,431x = 405,413,829,433,653.75
  5. Step 5: Solve for x
    x = 405,413,829,433,653.75/20,988,431
  6. Step 6: Final answer
    x = 19,316,061.76

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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.