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Finding the Fourth Proportional to 20,572,722.90, 28,764,020.70 and 20,572,722.90

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Solution

The fourth proportional to 20,572,722.90, 28,764,020.70 and 20,572,722.90 is: 28,764,020.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,572,722.90 : 28,764,020.70 = 20,572,722.90 : x
  2. Step 2: Convert to fraction form
    20,572,722.90/28,764,020.70 = 20,572,722.90/x
  3. Step 3: Cross multiply
    20,572,722.90x = 28,764,020.70 × 20,572,722.90
  4. Step 4: Simplify right side
    20,572,722.90x = 591,754,227,350,964
  5. Step 5: Solve for x
    x = 591,754,227,350,964/20,572,722.90
  6. Step 6: Final answer
    x = 28,764,020.70

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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.