Home / 30,918.58-42,635.37-18,340.90

Finding the Fourth Proportional to 30,918.58, 42,635.37 and 18,340.90

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Solution

The fourth proportional to 30,918.58, 42,635.37 and 18,340.90 is: 25,291.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,918.58 : 42,635.37 = 18,340.90 : x
  2. Step 2: Convert to fraction form
    30,918.58/42,635.37 = 18,340.90/x
  3. Step 3: Cross multiply
    30,918.58x = 42,635.37 × 18,340.90
  4. Step 4: Simplify right side
    30,918.58x = 781,971,057.63
  5. Step 5: Solve for x
    x = 781,971,057.63/30,918.58
  6. Step 6: Final answer
    x = 25,291.30

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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.