Home / 20,718.36-28,608.20-16,890.60

Finding the Fourth Proportional to 20,718.36, 28,608.20 and 16,890.60

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Solution

The fourth proportional to 20,718.36, 28,608.20 and 16,890.60 is: 23,322.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,718.36 : 28,608.20 = 16,890.60 : x
  2. Step 2: Convert to fraction form
    20,718.36/28,608.20 = 16,890.60/x
  3. Step 3: Cross multiply
    20,718.36x = 28,608.20 × 16,890.60
  4. Step 4: Simplify right side
    20,718.36x = 483,209,578.47
  5. Step 5: Solve for x
    x = 483,209,578.47/20,718.36
  6. Step 6: Final answer
    x = 23,322.77

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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.