Home / 20,929.77-28,884.69-11,980.08

Finding the Fourth Proportional to 20,929.77, 28,884.69 and 11,980.08

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Solution

The fourth proportional to 20,929.77, 28,884.69 and 11,980.08 is: 16,533.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,929.77 : 28,884.69 = 11,980.08 : x
  2. Step 2: Convert to fraction form
    20,929.77/28,884.69 = 11,980.08/x
  3. Step 3: Cross multiply
    20,929.77x = 28,884.69 × 11,980.08
  4. Step 4: Simplify right side
    20,929.77x = 346,040,896.98
  5. Step 5: Solve for x
    x = 346,040,896.98/20,929.77
  6. Step 6: Final answer
    x = 16,533.43

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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.