Home / 28,578.09-39,437.41-15,831.22

Finding the Fourth Proportional to 28,578.09, 39,437.41 and 15,831.22

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Solution

The fourth proportional to 28,578.09, 39,437.41 and 15,831.22 is: 21,846.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,578.09 : 39,437.41 = 15,831.22 : x
  2. Step 2: Convert to fraction form
    28,578.09/39,437.41 = 15,831.22/x
  3. Step 3: Cross multiply
    28,578.09x = 39,437.41 × 15,831.22
  4. Step 4: Simplify right side
    28,578.09x = 624,342,313.94
  5. Step 5: Solve for x
    x = 624,342,313.94/28,578.09
  6. Step 6: Final answer
    x = 21,846.89

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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.