Home / 28,618.68-42,940.32-13,838.64

Finding the Fourth Proportional to 28,618.68, 42,940.32 and 13,838.64

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Solution

The fourth proportional to 28,618.68, 42,940.32 and 13,838.64 is: 20,763.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,618.68 : 42,940.32 = 13,838.64 : x
  2. Step 2: Convert to fraction form
    28,618.68/42,940.32 = 13,838.64/x
  3. Step 3: Cross multiply
    28,618.68x = 42,940.32 × 13,838.64
  4. Step 4: Simplify right side
    28,618.68x = 594,235,629.96
  5. Step 5: Solve for x
    x = 594,235,629.96/28,618.68
  6. Step 6: Final answer
    x = 20,763.91

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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.