Home / 20,860.44-28,782.45-12,683.81

Finding the Fourth Proportional to 20,860.44, 28,782.45 and 12,683.81

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Solution

The fourth proportional to 20,860.44, 28,782.45 and 12,683.81 is: 17,500.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,860.44 : 28,782.45 = 12,683.81 : x
  2. Step 2: Convert to fraction form
    20,860.44/28,782.45 = 12,683.81/x
  3. Step 3: Cross multiply
    20,860.44x = 28,782.45 × 12,683.81
  4. Step 4: Simplify right side
    20,860.44x = 365,070,983.22
  5. Step 5: Solve for x
    x = 365,070,983.22/20,860.44
  6. Step 6: Final answer
    x = 17,500.64

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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.