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Finding the Fourth Proportional to 18,974.60, 28,459.20 and 6,495.20

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Solution

The fourth proportional to 18,974.60, 28,459.20 and 6,495.20 is: 9,741.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,974.60 : 28,459.20 = 6,495.20 : x
  2. Step 2: Convert to fraction form
    18,974.60/28,459.20 = 6,495.20/x
  3. Step 3: Cross multiply
    18,974.60x = 28,459.20 × 6,495.20
  4. Step 4: Simplify right side
    18,974.60x = 184,848,195.84
  5. Step 5: Solve for x
    x = 184,848,195.84/18,974.60
  6. Step 6: Final answer
    x = 9,741.88

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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.