Home / 20,521.61-28,318.60-11,907.12

Finding the Fourth Proportional to 20,521.61, 28,318.60 and 11,907.12

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Solution

The fourth proportional to 20,521.61, 28,318.60 and 11,907.12 is: 16,431.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,521.61 : 28,318.60 = 11,907.12 : x
  2. Step 2: Convert to fraction form
    20,521.61/28,318.60 = 11,907.12/x
  3. Step 3: Cross multiply
    20,521.61x = 28,318.60 × 11,907.12
  4. Step 4: Simplify right side
    20,521.61x = 337,193,022.53
  5. Step 5: Solve for x
    x = 337,193,022.53/20,521.61
  6. Step 6: Final answer
    x = 16,431.12

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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.