Home / 30,124.78-45,131.75-18,878.03

Finding the Fourth Proportional to 30,124.78, 45,131.75 and 18,878.03

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Solution

The fourth proportional to 30,124.78, 45,131.75 and 18,878.03 is: 28,282.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,124.78 : 45,131.75 = 18,878.03 : x
  2. Step 2: Convert to fraction form
    30,124.78/45,131.75 = 18,878.03/x
  3. Step 3: Cross multiply
    30,124.78x = 45,131.75 × 18,878.03
  4. Step 4: Simplify right side
    30,124.78x = 851,998,210.40
  5. Step 5: Solve for x
    x = 851,998,210.40/30,124.78
  6. Step 6: Final answer
    x = 28,282.31

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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.