Home / 30,751.85-42,439.39-18,817.52

Finding the Fourth Proportional to 30,751.85, 42,439.39 and 18,817.52

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Solution

The fourth proportional to 30,751.85, 42,439.39 and 18,817.52 is: 25,969.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,751.85 : 42,439.39 = 18,817.52 : x
  2. Step 2: Convert to fraction form
    30,751.85/42,439.39 = 18,817.52/x
  3. Step 3: Cross multiply
    30,751.85x = 42,439.39 × 18,817.52
  4. Step 4: Simplify right side
    30,751.85x = 798,603,916.72
  5. Step 5: Solve for x
    x = 798,603,916.72/30,751.85
  6. Step 6: Final answer
    x = 25,969.29

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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.