Home / 20,487.61-28,280.55-11,992.42

Finding the Fourth Proportional to 20,487.61, 28,280.55 and 11,992.42

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Solution

The fourth proportional to 20,487.61, 28,280.55 and 11,992.42 is: 16,554.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,487.61 : 28,280.55 = 11,992.42 : x
  2. Step 2: Convert to fraction form
    20,487.61/28,280.55 = 11,992.42/x
  3. Step 3: Cross multiply
    20,487.61x = 28,280.55 × 11,992.42
  4. Step 4: Simplify right side
    20,487.61x = 339,152,233.43
  5. Step 5: Solve for x
    x = 339,152,233.43/20,487.61
  6. Step 6: Final answer
    x = 16,554.02

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.