Home / 21,011.75-28,996.23-11,451.65

Finding the Fourth Proportional to 21,011.75, 28,996.23 and 11,451.65

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Solution

The fourth proportional to 21,011.75, 28,996.23 and 11,451.65 is: 15,803.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,011.75 : 28,996.23 = 11,451.65 : x
  2. Step 2: Convert to fraction form
    21,011.75/28,996.23 = 11,451.65/x
  3. Step 3: Cross multiply
    21,011.75x = 28,996.23 × 11,451.65
  4. Step 4: Simplify right side
    21,011.75x = 332,054,532.30
  5. Step 5: Solve for x
    x = 332,054,532.30/21,011.75
  6. Step 6: Final answer
    x = 15,803.28

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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.