Home / 30,999.78-42,778.31-17,570.75

Finding the Fourth Proportional to 30,999.78, 42,778.31 and 17,570.75

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Solution

The fourth proportional to 30,999.78, 42,778.31 and 17,570.75 is: 24,246.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,999.78 : 42,778.31 = 17,570.75 : x
  2. Step 2: Convert to fraction form
    30,999.78/42,778.31 = 17,570.75/x
  3. Step 3: Cross multiply
    30,999.78x = 42,778.31 × 17,570.75
  4. Step 4: Simplify right side
    30,999.78x = 751,646,688.69
  5. Step 5: Solve for x
    x = 751,646,688.69/30,999.78
  6. Step 6: Final answer
    x = 24,246.84

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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.