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Finding the Fourth Proportional to 20,735,999.90, 31,103,999.86 and 20,735,999.90

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Solution

The fourth proportional to 20,735,999.90, 31,103,999.86 and 20,735,999.90 is: 31,103,999.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,735,999.90 : 31,103,999.86 = 20,735,999.90 : x
  2. Step 2: Convert to fraction form
    20,735,999.90/31,103,999.86 = 20,735,999.90/x
  3. Step 3: Cross multiply
    20,735,999.90x = 31,103,999.86 × 20,735,999.90
  4. Step 4: Simplify right side
    20,735,999.90x = 644,972,537,986,560
  5. Step 5: Solve for x
    x = 644,972,537,986,560/20,735,999.90
  6. Step 6: Final answer
    x = 31,103,999.86

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1.5x scale

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.