Home / 20,448.45-30,618-11,671.29

Finding the Fourth Proportional to 20,448.45, 30,618 and 11,671.29

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Solution

The fourth proportional to 20,448.45, 30,618 and 11,671.29 is: 17,475.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,448.45 : 30,618 = 11,671.29 : x
  2. Step 2: Convert to fraction form
    20,448.45/30,618 = 11,671.29/x
  3. Step 3: Cross multiply
    20,448.45x = 30,618 × 11,671.29
  4. Step 4: Simplify right side
    20,448.45x = 357,351,557.22
  5. Step 5: Solve for x
    x = 357,351,557.22/20,448.45
  6. Step 6: Final answer
    x = 17,475.73

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.