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Finding the Fourth Proportional to 21,273,311.70, 31,909,967.55 and 21,273,311.70

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Solution

The fourth proportional to 21,273,311.70, 31,909,967.55 and 21,273,311.70 is: 31,909,967.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,273,311.70 : 31,909,967.55 = 21,273,311.70 : x
  2. Step 2: Convert to fraction form
    21,273,311.70/31,909,967.55 = 21,273,311.70/x
  3. Step 3: Cross multiply
    21,273,311.70x = 31,909,967.55 × 21,273,311.70
  4. Step 4: Simplify right side
    21,273,311.70x = 678,830,686,028,035.38
  5. Step 5: Solve for x
    x = 678,830,686,028,035.38/21,273,311.70
  6. Step 6: Final answer
    x = 31,909,967.55

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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.