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Finding the Fourth Proportional to 18,946.01, 28,419.11 and 4,905.05

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Solution

The fourth proportional to 18,946.01, 28,419.11 and 4,905.05 is: 7,357.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,946.01 : 28,419.11 = 4,905.05 : x
  2. Step 2: Convert to fraction form
    18,946.01/28,419.11 = 4,905.05/x
  3. Step 3: Cross multiply
    18,946.01x = 28,419.11 × 4,905.05
  4. Step 4: Simplify right side
    18,946.01x = 139,397,226.55
  5. Step 5: Solve for x
    x = 139,397,226.55/18,946.01
  6. Step 6: Final answer
    x = 7,357.60

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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.