Home / 21,036.57-31,530.63-8,542.88

Finding the Fourth Proportional to 21,036.57, 31,530.63 and 8,542.88

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Solution

The fourth proportional to 21,036.57, 31,530.63 and 8,542.88 is: 12,804.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,036.57 : 31,530.63 = 8,542.88 : x
  2. Step 2: Convert to fraction form
    21,036.57/31,530.63 = 8,542.88/x
  3. Step 3: Cross multiply
    21,036.57x = 31,530.63 × 8,542.88
  4. Step 4: Simplify right side
    21,036.57x = 269,362,230.76
  5. Step 5: Solve for x
    x = 269,362,230.76/21,036.57
  6. Step 6: Final answer
    x = 12,804.47

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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.