Home / 28,629.78-39,490.92-20,683.68

Finding the Fourth Proportional to 28,629.78, 39,490.92 and 20,683.68

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Solution

The fourth proportional to 28,629.78, 39,490.92 and 20,683.68 is: 28,530.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,629.78 : 39,490.92 = 20,683.68 : x
  2. Step 2: Convert to fraction form
    28,629.78/39,490.92 = 20,683.68/x
  3. Step 3: Cross multiply
    28,629.78x = 39,490.92 × 20,683.68
  4. Step 4: Simplify right side
    28,629.78x = 816,817,552.19
  5. Step 5: Solve for x
    x = 816,817,552.19/28,629.78
  6. Step 6: Final answer
    x = 28,530.35

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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.