Home / 20,011.65-27,615.33-11,515.08

Finding the Fourth Proportional to 20,011.65, 27,615.33 and 11,515.08

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Solution

The fourth proportional to 20,011.65, 27,615.33 and 11,515.08 is: 15,890.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,011.65 : 27,615.33 = 11,515.08 : x
  2. Step 2: Convert to fraction form
    20,011.65/27,615.33 = 11,515.08/x
  3. Step 3: Cross multiply
    20,011.65x = 27,615.33 × 11,515.08
  4. Step 4: Simplify right side
    20,011.65x = 317,992,837.73
  5. Step 5: Solve for x
    x = 317,992,837.73/20,011.65
  6. Step 6: Final answer
    x = 15,890.39

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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.