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Finding the Fourth Proportional to 18,968.72, 28,467.43 and 10,655.72

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Solution

The fourth proportional to 18,968.72, 28,467.43 and 10,655.72 is: 15,991.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,968.72 : 28,467.43 = 10,655.72 : x
  2. Step 2: Convert to fraction form
    18,968.72/28,467.43 = 10,655.72/x
  3. Step 3: Cross multiply
    18,968.72x = 28,467.43 × 10,655.72
  4. Step 4: Simplify right side
    18,968.72x = 303,341,058.53
  5. Step 5: Solve for x
    x = 303,341,058.53/18,968.72
  6. Step 6: Final answer
    x = 15,991.65

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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.