Home / 28,471.86-39,291.78-15,896.64

Finding the Fourth Proportional to 28,471.86, 39,291.78 and 15,896.64

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Solution

The fourth proportional to 28,471.86, 39,291.78 and 15,896.64 is: 21,937.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,471.86 : 39,291.78 = 15,896.64 : x
  2. Step 2: Convert to fraction form
    28,471.86/39,291.78 = 15,896.64/x
  3. Step 3: Cross multiply
    28,471.86x = 39,291.78 × 15,896.64
  4. Step 4: Simplify right side
    28,471.86x = 624,607,281.62
  5. Step 5: Solve for x
    x = 624,607,281.62/28,471.86
  6. Step 6: Final answer
    x = 21,937.71

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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.