Home / 30,883.25-42,619.71-18,779.55

Finding the Fourth Proportional to 30,883.25, 42,619.71 and 18,779.55

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Solution

The fourth proportional to 30,883.25, 42,619.71 and 18,779.55 is: 25,916.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,883.25 : 42,619.71 = 18,779.55 : x
  2. Step 2: Convert to fraction form
    30,883.25/42,619.71 = 18,779.55/x
  3. Step 3: Cross multiply
    30,883.25x = 42,619.71 × 18,779.55
  4. Step 4: Simplify right side
    30,883.25x = 800,378,974.93
  5. Step 5: Solve for x
    x = 800,378,974.93/30,883.25
  6. Step 6: Final answer
    x = 25,916.28

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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.