Home / 28,815.25-43,239.89-12,174.21

Finding the Fourth Proportional to 28,815.25, 43,239.89 and 12,174.21

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Solution

The fourth proportional to 28,815.25, 43,239.89 and 12,174.21 is: 18,268.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,815.25 : 43,239.89 = 12,174.21 : x
  2. Step 2: Convert to fraction form
    28,815.25/43,239.89 = 12,174.21/x
  3. Step 3: Cross multiply
    28,815.25x = 43,239.89 × 12,174.21
  4. Step 4: Simplify right side
    28,815.25x = 526,411,501.24
  5. Step 5: Solve for x
    x = 526,411,501.24/28,815.25
  6. Step 6: Final answer
    x = 18,268.50

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1.5x scale

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.