Home / 20,764.99-28,643.31-12,801.28

Finding the Fourth Proportional to 20,764.99, 28,643.31 and 12,801.28

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Solution

The fourth proportional to 20,764.99, 28,643.31 and 12,801.28 is: 17,658.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,764.99 : 28,643.31 = 12,801.28 : x
  2. Step 2: Convert to fraction form
    20,764.99/28,643.31 = 12,801.28/x
  3. Step 3: Cross multiply
    20,764.99x = 28,643.31 × 12,801.28
  4. Step 4: Simplify right side
    20,764.99x = 366,671,031.44
  5. Step 5: Solve for x
    x = 366,671,031.44/20,764.99
  6. Step 6: Final answer
    x = 17,658.14

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.