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Finding the Fourth Proportional to 13,351.60, 20,002.80 and 7,807.60

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Solution

The fourth proportional to 13,351.60, 20,002.80 and 7,807.60 is: 11,697.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,351.60 : 20,002.80 = 7,807.60 : x
  2. Step 2: Convert to fraction form
    13,351.60/20,002.80 = 7,807.60/x
  3. Step 3: Cross multiply
    13,351.60x = 20,002.80 × 7,807.60
  4. Step 4: Simplify right side
    13,351.60x = 156,173,861.28
  5. Step 5: Solve for x
    x = 156,173,861.28/13,351.60
  6. Step 6: Final answer
    x = 11,697.01

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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.