Home / 20,678.40-28,536.08-11,725.88

Finding the Fourth Proportional to 20,678.40, 28,536.08 and 11,725.88

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Solution

The fourth proportional to 20,678.40, 28,536.08 and 11,725.88 is: 16,181.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,678.40 : 28,536.08 = 11,725.88 : x
  2. Step 2: Convert to fraction form
    20,678.40/28,536.08 = 11,725.88/x
  3. Step 3: Cross multiply
    20,678.40x = 28,536.08 × 11,725.88
  4. Step 4: Simplify right side
    20,678.40x = 334,610,649.75
  5. Step 5: Solve for x
    x = 334,610,649.75/20,678.40
  6. Step 6: Final answer
    x = 16,181.65

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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.