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Finding the Fourth Proportional to 21,029,612.80, 29,483,973.20 and 21,029,612.80

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Solution

The fourth proportional to 21,029,612.80, 29,483,973.20 and 21,029,612.80 is: 29,483,973.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,029,612.80 : 29,483,973.20 = 21,029,612.80 : x
  2. Step 2: Convert to fraction form
    21,029,612.80/29,483,973.20 = 21,029,612.80/x
  3. Step 3: Cross multiply
    21,029,612.80x = 29,483,973.20 × 21,029,612.80
  4. Step 4: Simplify right side
    21,029,612.80x = 620,036,540,201,577
  5. Step 5: Solve for x
    x = 620,036,540,201,577/21,029,612.80
  6. Step 6: Final answer
    x = 29,483,973.20

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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.