Home / 15,286.69-21,095.62-8,913.54

Finding the Fourth Proportional to 15,286.69, 21,095.62 and 8,913.54

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Solution

The fourth proportional to 15,286.69, 21,095.62 and 8,913.54 is: 12,300.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,286.69 : 21,095.62 = 8,913.54 : x
  2. Step 2: Convert to fraction form
    15,286.69/21,095.62 = 8,913.54/x
  3. Step 3: Cross multiply
    15,286.69x = 21,095.62 × 8,913.54
  4. Step 4: Simplify right side
    15,286.69x = 188,036,709.52
  5. Step 5: Solve for x
    x = 188,036,709.52/15,286.69
  6. Step 6: Final answer
    x = 12,300.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.