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Finding the Fourth Proportional to 20,340.90, 30,501.63 and 9,940.50

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Solution

The fourth proportional to 20,340.90, 30,501.63 and 9,940.50 is: 14,906.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,340.90 : 30,501.63 = 9,940.50 : x
  2. Step 2: Convert to fraction form
    20,340.90/30,501.63 = 9,940.50/x
  3. Step 3: Cross multiply
    20,340.90x = 30,501.63 × 9,940.50
  4. Step 4: Simplify right side
    20,340.90x = 303,201,453.02
  5. Step 5: Solve for x
    x = 303,201,453.02/20,340.90
  6. Step 6: Final answer
    x = 14,906.00

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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.