Home / 30,645.75-42,263.06-19,879.41

Finding the Fourth Proportional to 30,645.75, 42,263.06 and 19,879.41

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Solution

The fourth proportional to 30,645.75, 42,263.06 and 19,879.41 is: 27,415.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,645.75 : 42,263.06 = 19,879.41 : x
  2. Step 2: Convert to fraction form
    30,645.75/42,263.06 = 19,879.41/x
  3. Step 3: Cross multiply
    30,645.75x = 42,263.06 × 19,879.41
  4. Step 4: Simplify right side
    30,645.75x = 840,164,598.20
  5. Step 5: Solve for x
    x = 840,164,598.20/30,645.75
  6. Step 6: Final answer
    x = 27,415.37

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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.