Home / 20,788.74-28,681.11-12,289.08

Finding the Fourth Proportional to 20,788.74, 28,681.11 and 12,289.08

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Solution

The fourth proportional to 20,788.74, 28,681.11 and 12,289.08 is: 16,954.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,788.74 : 28,681.11 = 12,289.08 : x
  2. Step 2: Convert to fraction form
    20,788.74/28,681.11 = 12,289.08/x
  3. Step 3: Cross multiply
    20,788.74x = 28,681.11 × 12,289.08
  4. Step 4: Simplify right side
    20,788.74x = 352,464,455.28
  5. Step 5: Solve for x
    x = 352,464,455.28/20,788.74
  6. Step 6: Final answer
    x = 16,954.58

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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.