Home / 20,969.58-28,937.88-11,538.12

Finding the Fourth Proportional to 20,969.58, 28,937.88 and 11,538.12

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Solution

The fourth proportional to 20,969.58, 28,937.88 and 11,538.12 is: 15,922.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,969.58 : 28,937.88 = 11,538.12 : x
  2. Step 2: Convert to fraction form
    20,969.58/28,937.88 = 11,538.12/x
  3. Step 3: Cross multiply
    20,969.58x = 28,937.88 × 11,538.12
  4. Step 4: Simplify right side
    20,969.58x = 333,888,731.99
  5. Step 5: Solve for x
    x = 333,888,731.99/20,969.58
  6. Step 6: Final answer
    x = 15,922.53

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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.