Home / 20,678.63-28,536.16-11,479.86

Finding the Fourth Proportional to 20,678.63, 28,536.16 and 11,479.86

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Solution

The fourth proportional to 20,678.63, 28,536.16 and 11,479.86 is: 15,842.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,678.63 : 28,536.16 = 11,479.86 : x
  2. Step 2: Convert to fraction form
    20,678.63/28,536.16 = 11,479.86/x
  3. Step 3: Cross multiply
    20,678.63x = 28,536.16 × 11,479.86
  4. Step 4: Simplify right side
    20,678.63x = 327,591,121.74
  5. Step 5: Solve for x
    x = 327,591,121.74/20,678.63
  6. Step 6: Final answer
    x = 15,842.01

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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.