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Finding the Fourth Proportional to 21,471,409.80, 29,996,200.80 and 21,471,409.80

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Solution

The fourth proportional to 21,471,409.80, 29,996,200.80 and 21,471,409.80 is: 29,996,200.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,471,409.80 : 29,996,200.80 = 21,471,409.80 : x
  2. Step 2: Convert to fraction form
    21,471,409.80/29,996,200.80 = 21,471,409.80/x
  3. Step 3: Cross multiply
    21,471,409.80x = 29,996,200.80 × 21,471,409.80
  4. Step 4: Simplify right side
    21,471,409.80x = 644,060,719,819,887.88
  5. Step 5: Solve for x
    x = 644,060,719,819,887.88/21,471,409.80
  6. Step 6: Final answer
    x = 29,996,200.80

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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.