Home / 30,629.28-42,272.32-18,690.08

Finding the Fourth Proportional to 30,629.28, 42,272.32 and 18,690.08

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Solution

The fourth proportional to 30,629.28, 42,272.32 and 18,690.08 is: 25,794.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,629.28 : 42,272.32 = 18,690.08 : x
  2. Step 2: Convert to fraction form
    30,629.28/42,272.32 = 18,690.08/x
  3. Step 3: Cross multiply
    30,629.28x = 42,272.32 × 18,690.08
  4. Step 4: Simplify right side
    30,629.28x = 790,073,042.59
  5. Step 5: Solve for x
    x = 790,073,042.59/30,629.28
  6. Step 6: Final answer
    x = 25,794.70

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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.