Home / 21,230.08-31,801.34-12,438.32

Finding the Fourth Proportional to 21,230.08, 31,801.34 and 12,438.32

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Solution

The fourth proportional to 21,230.08, 31,801.34 and 12,438.32 is: 18,631.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,230.08 : 31,801.34 = 12,438.32 : x
  2. Step 2: Convert to fraction form
    21,230.08/31,801.34 = 12,438.32/x
  3. Step 3: Cross multiply
    21,230.08x = 31,801.34 × 12,438.32
  4. Step 4: Simplify right side
    21,230.08x = 395,555,243.35
  5. Step 5: Solve for x
    x = 395,555,243.35/21,230.08
  6. Step 6: Final answer
    x = 18,631.83

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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.