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Finding the Fourth Proportional to 21,301,312.80, 31,951,969.20 and 21,301,312.80

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Solution

The fourth proportional to 21,301,312.80, 31,951,969.20 and 21,301,312.80 is: 31,951,969.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,301,312.80 : 31,951,969.20 = 21,301,312.80 : x
  2. Step 2: Convert to fraction form
    21,301,312.80/31,951,969.20 = 21,301,312.80/x
  3. Step 3: Cross multiply
    21,301,312.80x = 31,951,969.20 × 21,301,312.80
  4. Step 4: Simplify right side
    21,301,312.80x = 680,618,890,505,165.75
  5. Step 5: Solve for x
    x = 680,618,890,505,165.75/21,301,312.80
  6. Step 6: Final answer
    x = 31,951,969.20

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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.