Home / 15,515.62-21,424.46-14,390

Finding the Fourth Proportional to 15,515.62, 21,424.46 and 14,390

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Solution

The fourth proportional to 15,515.62, 21,424.46 and 14,390 is: 19,870.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,515.62 : 21,424.46 = 14,390 : x
  2. Step 2: Convert to fraction form
    15,515.62/21,424.46 = 14,390/x
  3. Step 3: Cross multiply
    15,515.62x = 21,424.46 × 14,390
  4. Step 4: Simplify right side
    15,515.62x = 308,297,979.40
  5. Step 5: Solve for x
    x = 308,297,979.40/15,515.62
  6. Step 6: Final answer
    x = 19,870.17

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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.