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Finding the Fourth Proportional to 28,404.20, 42,618 and 11,767.58

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Solution

The fourth proportional to 28,404.20, 42,618 and 11,767.58 is: 17,656.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,404.20 : 42,618 = 11,767.58 : x
  2. Step 2: Convert to fraction form
    28,404.20/42,618 = 11,767.58/x
  3. Step 3: Cross multiply
    28,404.20x = 42,618 × 11,767.58
  4. Step 4: Simplify right side
    28,404.20x = 501,510,724.44
  5. Step 5: Solve for x
    x = 501,510,724.44/28,404.20
  6. Step 6: Final answer
    x = 17,656.22

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