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Finding the Fourth Proportional to 21,201,937.80, 31,802,906.70 and 21,201,937.80

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Solution

The fourth proportional to 21,201,937.80, 31,802,906.70 and 21,201,937.80 is: 31,802,906.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,201,937.80 : 31,802,906.70 = 21,201,937.80 : x
  2. Step 2: Convert to fraction form
    21,201,937.80/31,802,906.70 = 21,201,937.80/x
  3. Step 3: Cross multiply
    21,201,937.80x = 31,802,906.70 × 21,201,937.80
  4. Step 4: Simplify right side
    21,201,937.80x = 674,283,249,712,603.25
  5. Step 5: Solve for x
    x = 674,283,249,712,603.25/21,201,937.80
  6. Step 6: Final answer
    x = 31,802,906.70

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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.