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Finding the Fourth Proportional to 28,368.62, 42,509.02 and 19,488.21

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Solution

The fourth proportional to 28,368.62, 42,509.02 and 19,488.21 is: 29,202.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,368.62 : 42,509.02 = 19,488.21 : x
  2. Step 2: Convert to fraction form
    28,368.62/42,509.02 = 19,488.21/x
  3. Step 3: Cross multiply
    28,368.62x = 42,509.02 × 19,488.21
  4. Step 4: Simplify right side
    28,368.62x = 828,424,708.65
  5. Step 5: Solve for x
    x = 828,424,708.65/28,368.62
  6. Step 6: Final answer
    x = 29,202.15

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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.