Home / 20,513,142.36-30,780,211.32-8,391,563.64

Finding the Fourth Proportional to 20,513,142.36, 30,780,211.32 and 8,391,563.64

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Solution

The fourth proportional to 20,513,142.36, 30,780,211.32 and 8,391,563.64 is: 12,591,639.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,513,142.36 : 30,780,211.32 = 8,391,563.64 : x
  2. Step 2: Convert to fraction form
    20,513,142.36/30,780,211.32 = 8,391,563.64/x
  3. Step 3: Cross multiply
    20,513,142.36x = 30,780,211.32 × 8,391,563.64
  4. Step 4: Simplify right side
    20,513,142.36x = 258,294,102,144,428.44
  5. Step 5: Solve for x
    x = 258,294,102,144,428.44/20,513,142.36
  6. Step 6: Final answer
    x = 12,591,639.92

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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.