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Finding the Fourth Proportional to 20,393.60, 30,601.55 and 7,914.12

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Solution

The fourth proportional to 20,393.60, 30,601.55 and 7,914.12 is: 11,875.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,393.60 : 30,601.55 = 7,914.12 : x
  2. Step 2: Convert to fraction form
    20,393.60/30,601.55 = 7,914.12/x
  3. Step 3: Cross multiply
    20,393.60x = 30,601.55 × 7,914.12
  4. Step 4: Simplify right side
    20,393.60x = 242,184,299.32
  5. Step 5: Solve for x
    x = 242,184,299.32/20,393.60
  6. Step 6: Final answer
    x = 11,875.51

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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.