Home / 28,718.87-39,630.38-15,971.31

Finding the Fourth Proportional to 28,718.87, 39,630.38 and 15,971.31

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Solution

The fourth proportional to 28,718.87, 39,630.38 and 15,971.31 is: 22,039.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,718.87 : 39,630.38 = 15,971.31 : x
  2. Step 2: Convert to fraction form
    28,718.87/39,630.38 = 15,971.31/x
  3. Step 3: Cross multiply
    28,718.87x = 39,630.38 × 15,971.31
  4. Step 4: Simplify right side
    28,718.87x = 632,949,004.54
  5. Step 5: Solve for x
    x = 632,949,004.54/28,718.87
  6. Step 6: Final answer
    x = 22,039.49

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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.