Home / 15,515.73-21,406.01-9,929.97

Finding the Fourth Proportional to 15,515.73, 21,406.01 and 9,929.97

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Solution

The fourth proportional to 15,515.73, 21,406.01 and 9,929.97 is: 13,699.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,515.73 : 21,406.01 = 9,929.97 : x
  2. Step 2: Convert to fraction form
    15,515.73/21,406.01 = 9,929.97/x
  3. Step 3: Cross multiply
    15,515.73x = 21,406.01 × 9,929.97
  4. Step 4: Simplify right side
    15,515.73x = 212,560,987.47
  5. Step 5: Solve for x
    x = 212,560,987.47/15,515.73
  6. Step 6: Final answer
    x = 13,699.71

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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.