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Finding the Fourth Proportional to 13,710.40, 20,563.40 and 4,940.80

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Solution

The fourth proportional to 13,710.40, 20,563.40 and 4,940.80 is: 7,410.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,710.40 : 20,563.40 = 4,940.80 : x
  2. Step 2: Convert to fraction form
    13,710.40/20,563.40 = 4,940.80/x
  3. Step 3: Cross multiply
    13,710.40x = 20,563.40 × 4,940.80
  4. Step 4: Simplify right side
    13,710.40x = 101,599,646.72
  5. Step 5: Solve for x
    x = 101,599,646.72/13,710.40
  6. Step 6: Final answer
    x = 7,410.41

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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.