Home / 21,151.98-31,727.88-12,442.32

Finding the Fourth Proportional to 21,151.98, 31,727.88 and 12,442.32

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Solution

The fourth proportional to 21,151.98, 31,727.88 and 12,442.32 is: 18,663.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,151.98 : 31,727.88 = 12,442.32 : x
  2. Step 2: Convert to fraction form
    21,151.98/31,727.88 = 12,442.32/x
  3. Step 3: Cross multiply
    21,151.98x = 31,727.88 × 12,442.32
  4. Step 4: Simplify right side
    21,151.98x = 394,768,435.88
  5. Step 5: Solve for x
    x = 394,768,435.88/21,151.98
  6. Step 6: Final answer
    x = 18,663.43

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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.