Home / 21,203.10-31,804.65-19,161.90

Finding the Fourth Proportional to 21,203.10, 31,804.65 and 19,161.90

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Solution

The fourth proportional to 21,203.10, 31,804.65 and 19,161.90 is: 28,742.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,203.10 : 31,804.65 = 19,161.90 : x
  2. Step 2: Convert to fraction form
    21,203.10/31,804.65 = 19,161.90/x
  3. Step 3: Cross multiply
    21,203.10x = 31,804.65 × 19,161.90
  4. Step 4: Simplify right side
    21,203.10x = 609,437,522.84
  5. Step 5: Solve for x
    x = 609,437,522.84/21,203.10
  6. Step 6: Final answer
    x = 28,742.85

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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.