Home / 28,519.78-42,786.96-11,874.28

Finding the Fourth Proportional to 28,519.78, 42,786.96 and 11,874.28

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Solution

The fourth proportional to 28,519.78, 42,786.96 and 11,874.28 is: 17,814.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,519.78 : 42,786.96 = 11,874.28 : x
  2. Step 2: Convert to fraction form
    28,519.78/42,786.96 = 11,874.28/x
  3. Step 3: Cross multiply
    28,519.78x = 42,786.96 × 11,874.28
  4. Step 4: Simplify right side
    28,519.78x = 508,064,343.39
  5. Step 5: Solve for x
    x = 508,064,343.39/28,519.78
  6. Step 6: Final answer
    x = 17,814.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.