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Finding the Fourth Proportional to 19,163.80, 28,680.90 and 19,163.80

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Solution

The fourth proportional to 19,163.80, 28,680.90 and 19,163.80 is: 28,680.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,163.80 : 28,680.90 = 19,163.80 : x
  2. Step 2: Convert to fraction form
    19,163.80/28,680.90 = 19,163.80/x
  3. Step 3: Cross multiply
    19,163.80x = 28,680.90 × 19,163.80
  4. Step 4: Simplify right side
    19,163.80x = 549,635,031.42
  5. Step 5: Solve for x
    x = 549,635,031.42/19,163.80
  6. Step 6: Final answer
    x = 28,680.90

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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.