Home / 20,930.33-28,888.83-11,983.01

Finding the Fourth Proportional to 20,930.33, 28,888.83 and 11,983.01

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Solution

The fourth proportional to 20,930.33, 28,888.83 and 11,983.01 is: 16,539.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,930.33 : 28,888.83 = 11,983.01 : x
  2. Step 2: Convert to fraction form
    20,930.33/28,888.83 = 11,983.01/x
  3. Step 3: Cross multiply
    20,930.33x = 28,888.83 × 11,983.01
  4. Step 4: Simplify right side
    20,930.33x = 346,174,994.33
  5. Step 5: Solve for x
    x = 346,174,994.33/20,930.33
  6. Step 6: Final answer
    x = 16,539.40

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1.5x scale

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.