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Finding the Fourth Proportional to 18,475.60, 27,705.30 and 7,378.60

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Solution

The fourth proportional to 18,475.60, 27,705.30 and 7,378.60 is: 11,064.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,475.60 : 27,705.30 = 7,378.60 : x
  2. Step 2: Convert to fraction form
    18,475.60/27,705.30 = 7,378.60/x
  3. Step 3: Cross multiply
    18,475.60x = 27,705.30 × 7,378.60
  4. Step 4: Simplify right side
    18,475.60x = 204,426,326.58
  5. Step 5: Solve for x
    x = 204,426,326.58/18,475.60
  6. Step 6: Final answer
    x = 11,064.67

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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.