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Finding the Fourth Proportional to 13,699.60, 20,548.98 and 4,940.20

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Solution

The fourth proportional to 13,699.60, 20,548.98 and 4,940.20 is: 7,410.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,699.60 : 20,548.98 = 4,940.20 : x
  2. Step 2: Convert to fraction form
    13,699.60/20,548.98 = 4,940.20/x
  3. Step 3: Cross multiply
    13,699.60x = 20,548.98 × 4,940.20
  4. Step 4: Simplify right side
    13,699.60x = 101,516,071.00
  5. Step 5: Solve for x
    x = 101,516,071.00/13,699.60
  6. Step 6: Final answer
    x = 7,410.15

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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.