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Finding the Fourth Proportional to 20,485,688.10, 30,728,532.15 and 20,485,688.10

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Solution

The fourth proportional to 20,485,688.10, 30,728,532.15 and 20,485,688.10 is: 30,728,532.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,485,688.10 : 30,728,532.15 = 20,485,688.10 : x
  2. Step 2: Convert to fraction form
    20,485,688.10/30,728,532.15 = 20,485,688.10/x
  3. Step 3: Cross multiply
    20,485,688.10x = 30,728,532.15 × 20,485,688.10
  4. Step 4: Simplify right side
    20,485,688.10x = 629,495,125,395,722.38
  5. Step 5: Solve for x
    x = 629,495,125,395,722.38/20,485,688.10
  6. Step 6: Final answer
    x = 30,728,532.15

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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.