Home / 28,439.52-42,661.08-8,718.36

Finding the Fourth Proportional to 28,439.52, 42,661.08 and 8,718.36

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Solution

The fourth proportional to 28,439.52, 42,661.08 and 8,718.36 is: 13,078.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,439.52 : 42,661.08 = 8,718.36 : x
  2. Step 2: Convert to fraction form
    28,439.52/42,661.08 = 8,718.36/x
  3. Step 3: Cross multiply
    28,439.52x = 42,661.08 × 8,718.36
  4. Step 4: Simplify right side
    28,439.52x = 371,934,653.43
  5. Step 5: Solve for x
    x = 371,934,653.43/28,439.52
  6. Step 6: Final answer
    x = 13,078.09

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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.