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Finding the Fourth Proportional to 21,856,512.10, 30,643,906.70 and 21,856,512.10

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Solution

The fourth proportional to 21,856,512.10, 30,643,906.70 and 21,856,512.10 is: 30,643,906.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,856,512.10 : 30,643,906.70 = 21,856,512.10 : x
  2. Step 2: Convert to fraction form
    21,856,512.10/30,643,906.70 = 21,856,512.10/x
  3. Step 3: Cross multiply
    21,856,512.10x = 30,643,906.70 × 21,856,512.10
  4. Step 4: Simplify right side
    21,856,512.10x = 669,768,917,579,821.12
  5. Step 5: Solve for x
    x = 669,768,917,579,821.12/21,856,512.10
  6. Step 6: Final answer
    x = 30,643,906.70

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.