Home / 30,959.76-42,709.32-18,375.60

Finding the Fourth Proportional to 30,959.76, 42,709.32 and 18,375.60

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Solution

The fourth proportional to 30,959.76, 42,709.32 and 18,375.60 is: 25,349.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,959.76 : 42,709.32 = 18,375.60 : x
  2. Step 2: Convert to fraction form
    30,959.76/42,709.32 = 18,375.60/x
  3. Step 3: Cross multiply
    30,959.76x = 42,709.32 × 18,375.60
  4. Step 4: Simplify right side
    30,959.76x = 784,809,380.59
  5. Step 5: Solve for x
    x = 784,809,380.59/30,959.76
  6. Step 6: Final answer
    x = 25,349.34

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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.