Home / 30,739.50-42,422.94-18,166.68

Finding the Fourth Proportional to 30,739.50, 42,422.94 and 18,166.68

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Solution

The fourth proportional to 30,739.50, 42,422.94 and 18,166.68 is: 25,071.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,739.50 : 42,422.94 = 18,166.68 : x
  2. Step 2: Convert to fraction form
    30,739.50/42,422.94 = 18,166.68/x
  3. Step 3: Cross multiply
    30,739.50x = 42,422.94 × 18,166.68
  4. Step 4: Simplify right side
    30,739.50x = 770,683,975.64
  5. Step 5: Solve for x
    x = 770,683,975.64/30,739.50
  6. Step 6: Final answer
    x = 25,071.45

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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.