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Finding the Fourth Proportional to 20,234,539.70, 28,392,128.50 and 20,234,539.70

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Solution

The fourth proportional to 20,234,539.70, 28,392,128.50 and 20,234,539.70 is: 28,392,128.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,234,539.70 : 28,392,128.50 = 20,234,539.70 : x
  2. Step 2: Convert to fraction form
    20,234,539.70/28,392,128.50 = 20,234,539.70/x
  3. Step 3: Cross multiply
    20,234,539.70x = 28,392,128.50 × 20,234,539.70
  4. Step 4: Simplify right side
    20,234,539.70x = 574,501,651,300,751.38
  5. Step 5: Solve for x
    x = 574,501,651,300,751.38/20,234,539.70
  6. Step 6: Final answer
    x = 28,392,128.50

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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.