Home / 30,958.22-42,738.08-19,639.28

Finding the Fourth Proportional to 30,958.22, 42,738.08 and 19,639.28

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Solution

The fourth proportional to 30,958.22, 42,738.08 and 19,639.28 is: 27,112.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,958.22 : 42,738.08 = 19,639.28 : x
  2. Step 2: Convert to fraction form
    30,958.22/42,738.08 = 19,639.28/x
  3. Step 3: Cross multiply
    30,958.22x = 42,738.08 × 19,639.28
  4. Step 4: Simplify right side
    30,958.22x = 839,344,807.90
  5. Step 5: Solve for x
    x = 839,344,807.90/30,958.22
  6. Step 6: Final answer
    x = 27,112.18

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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.