Home / 28,104.85-42,178.07-13,313.80

Finding the Fourth Proportional to 28,104.85, 42,178.07 and 13,313.80

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Solution

The fourth proportional to 28,104.85, 42,178.07 and 13,313.80 is: 19,980.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,104.85 : 42,178.07 = 13,313.80 : x
  2. Step 2: Convert to fraction form
    28,104.85/42,178.07 = 13,313.80/x
  3. Step 3: Cross multiply
    28,104.85x = 42,178.07 × 13,313.80
  4. Step 4: Simplify right side
    28,104.85x = 561,550,388.37
  5. Step 5: Solve for x
    x = 561,550,388.37/28,104.85
  6. Step 6: Final answer
    x = 19,980.55

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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.