Home / 20,613.69-28,447.40-12,651.39

Finding the Fourth Proportional to 20,613.69, 28,447.40 and 12,651.39

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Solution

The fourth proportional to 20,613.69, 28,447.40 and 12,651.39 is: 17,459.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,613.69 : 28,447.40 = 12,651.39 : x
  2. Step 2: Convert to fraction form
    20,613.69/28,447.40 = 12,651.39/x
  3. Step 3: Cross multiply
    20,613.69x = 28,447.40 × 12,651.39
  4. Step 4: Simplify right side
    20,613.69x = 359,899,183.51
  5. Step 5: Solve for x
    x = 359,899,183.51/20,613.69
  6. Step 6: Final answer
    x = 17,459.23

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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.