Home / 30,880.27-42,603.87-18,939.25

Finding the Fourth Proportional to 30,880.27, 42,603.87 and 18,939.25

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Solution

The fourth proportional to 30,880.27, 42,603.87 and 18,939.25 is: 26,129.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,880.27 : 42,603.87 = 18,939.25 : x
  2. Step 2: Convert to fraction form
    30,880.27/42,603.87 = 18,939.25/x
  3. Step 3: Cross multiply
    30,880.27x = 42,603.87 × 18,939.25
  4. Step 4: Simplify right side
    30,880.27x = 806,885,344.90
  5. Step 5: Solve for x
    x = 806,885,344.90/30,880.27
  6. Step 6: Final answer
    x = 26,129.48

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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.