Home / 20,639.08-28,485.09-16,647.80

Finding the Fourth Proportional to 20,639.08, 28,485.09 and 16,647.80

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Solution

The fourth proportional to 20,639.08, 28,485.09 and 16,647.80 is: 22,976.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,639.08 : 28,485.09 = 16,647.80 : x
  2. Step 2: Convert to fraction form
    20,639.08/28,485.09 = 16,647.80/x
  3. Step 3: Cross multiply
    20,639.08x = 28,485.09 × 16,647.80
  4. Step 4: Simplify right side
    20,639.08x = 474,214,152.51
  5. Step 5: Solve for x
    x = 474,214,152.51/20,639.08
  6. Step 6: Final answer
    x = 22,976.52

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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.