Home / 30,919.56-42,670.04-18,172.56

Finding the Fourth Proportional to 30,919.56, 42,670.04 and 18,172.56

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Solution

The fourth proportional to 30,919.56, 42,670.04 and 18,172.56 is: 25,078.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,919.56 : 42,670.04 = 18,172.56 : x
  2. Step 2: Convert to fraction form
    30,919.56/42,670.04 = 18,172.56/x
  3. Step 3: Cross multiply
    30,919.56x = 42,670.04 × 18,172.56
  4. Step 4: Simplify right side
    30,919.56x = 775,423,862.10
  5. Step 5: Solve for x
    x = 775,423,862.10/30,919.56
  6. Step 6: Final answer
    x = 25,078.75

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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.