Home / 21,007.87-28,990.53-11,576.77

Finding the Fourth Proportional to 21,007.87, 28,990.53 and 11,576.77

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Solution

The fourth proportional to 21,007.87, 28,990.53 and 11,576.77 is: 15,975.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,007.87 : 28,990.53 = 11,576.77 : x
  2. Step 2: Convert to fraction form
    21,007.87/28,990.53 = 11,576.77/x
  3. Step 3: Cross multiply
    21,007.87x = 28,990.53 × 11,576.77
  4. Step 4: Simplify right side
    21,007.87x = 335,616,697.99
  5. Step 5: Solve for x
    x = 335,616,697.99/21,007.87
  6. Step 6: Final answer
    x = 15,975.76

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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.