Home / 21,379.72-32,052.28-8,909.12

Finding the Fourth Proportional to 21,379.72, 32,052.28 and 8,909.12

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Solution

The fourth proportional to 21,379.72, 32,052.28 and 8,909.12 is: 13,356.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,379.72 : 32,052.28 = 8,909.12 : x
  2. Step 2: Convert to fraction form
    21,379.72/32,052.28 = 8,909.12/x
  3. Step 3: Cross multiply
    21,379.72x = 32,052.28 × 8,909.12
  4. Step 4: Simplify right side
    21,379.72x = 285,557,608.79
  5. Step 5: Solve for x
    x = 285,557,608.79/21,379.72
  6. Step 6: Final answer
    x = 13,356.47

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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.