Home / 15,515.73-21,436.79-10,820.97

Finding the Fourth Proportional to 15,515.73, 21,436.79 and 10,820.97

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Solution

The fourth proportional to 15,515.73, 21,436.79 and 10,820.97 is: 14,950.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,515.73 : 21,436.79 = 10,820.97 : x
  2. Step 2: Convert to fraction form
    15,515.73/21,436.79 = 10,820.97/x
  3. Step 3: Cross multiply
    15,515.73x = 21,436.79 × 10,820.97
  4. Step 4: Simplify right side
    15,515.73x = 231,966,807.38
  5. Step 5: Solve for x
    x = 231,966,807.38/15,515.73
  6. Step 6: Final answer
    x = 14,950.43

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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.