Home / 21,223.18-31,840.52-18,899.32

Finding the Fourth Proportional to 21,223.18, 31,840.52 and 18,899.32

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Solution

The fourth proportional to 21,223.18, 31,840.52 and 18,899.32 is: 28,354.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,223.18 : 31,840.52 = 18,899.32 : x
  2. Step 2: Convert to fraction form
    21,223.18/31,840.52 = 18,899.32/x
  3. Step 3: Cross multiply
    21,223.18x = 31,840.52 × 18,899.32
  4. Step 4: Simplify right side
    21,223.18x = 601,764,144.09
  5. Step 5: Solve for x
    x = 601,764,144.09/21,223.18
  6. Step 6: Final answer
    x = 28,354.10

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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.