Home / 30,919.58-42,636.75-18,341.90

Finding the Fourth Proportional to 30,919.58, 42,636.75 and 18,341.90

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Solution

The fourth proportional to 30,919.58, 42,636.75 and 18,341.90 is: 25,292.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,919.58 : 42,636.75 = 18,341.90 : x
  2. Step 2: Convert to fraction form
    30,919.58/42,636.75 = 18,341.90/x
  3. Step 3: Cross multiply
    30,919.58x = 42,636.75 × 18,341.90
  4. Step 4: Simplify right side
    30,919.58x = 782,039,004.83
  5. Step 5: Solve for x
    x = 782,039,004.83/30,919.58
  6. Step 6: Final answer
    x = 25,292.68

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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.