Home / 30,739.03-42,420.65-17,310.78

Finding the Fourth Proportional to 30,739.03, 42,420.65 and 17,310.78

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Solution

The fourth proportional to 30,739.03, 42,420.65 and 17,310.78 is: 23,889.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,739.03 : 42,420.65 = 17,310.78 : x
  2. Step 2: Convert to fraction form
    30,739.03/42,420.65 = 17,310.78/x
  3. Step 3: Cross multiply
    30,739.03x = 42,420.65 × 17,310.78
  4. Step 4: Simplify right side
    30,739.03x = 734,334,453.05
  5. Step 5: Solve for x
    x = 734,334,453.05/30,739.03
  6. Step 6: Final answer
    x = 23,889.32

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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.