Home / 21,531.72-32,239.64-12,157.68

Finding the Fourth Proportional to 21,531.72, 32,239.64 and 12,157.68

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Solution

The fourth proportional to 21,531.72, 32,239.64 and 12,157.68 is: 18,203.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,531.72 : 32,239.64 = 12,157.68 : x
  2. Step 2: Convert to fraction form
    21,531.72/32,239.64 = 12,157.68/x
  3. Step 3: Cross multiply
    21,531.72x = 32,239.64 × 12,157.68
  4. Step 4: Simplify right side
    21,531.72x = 391,959,226.44
  5. Step 5: Solve for x
    x = 391,959,226.44/21,531.72
  6. Step 6: Final answer
    x = 18,203.80

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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.