Home / 20,678.09-28,540.35-12,613.52

Finding the Fourth Proportional to 20,678.09, 28,540.35 and 12,613.52

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Solution

The fourth proportional to 20,678.09, 28,540.35 and 12,613.52 is: 17,409.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,678.09 : 28,540.35 = 12,613.52 : x
  2. Step 2: Convert to fraction form
    20,678.09/28,540.35 = 12,613.52/x
  3. Step 3: Cross multiply
    20,678.09x = 28,540.35 × 12,613.52
  4. Step 4: Simplify right side
    20,678.09x = 359,994,346.88
  5. Step 5: Solve for x
    x = 359,994,346.88/20,678.09
  6. Step 6: Final answer
    x = 17,409.46

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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.