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Finding the Fourth Proportional to 18,888.08, 28,344.60 and 18,742.16

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Solution

The fourth proportional to 18,888.08, 28,344.60 and 18,742.16 is: 28,125.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,888.08 : 28,344.60 = 18,742.16 : x
  2. Step 2: Convert to fraction form
    18,888.08/28,344.60 = 18,742.16/x
  3. Step 3: Cross multiply
    18,888.08x = 28,344.60 × 18,742.16
  4. Step 4: Simplify right side
    18,888.08x = 531,239,028.34
  5. Step 5: Solve for x
    x = 531,239,028.34/18,888.08
  6. Step 6: Final answer
    x = 28,125.62

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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.