Home / 30,971.28-42,744.20-18,396.08

Finding the Fourth Proportional to 30,971.28, 42,744.20 and 18,396.08

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Solution

The fourth proportional to 30,971.28, 42,744.20 and 18,396.08 is: 25,388.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,971.28 : 42,744.20 = 18,396.08 : x
  2. Step 2: Convert to fraction form
    30,971.28/42,744.20 = 18,396.08/x
  3. Step 3: Cross multiply
    30,971.28x = 42,744.20 × 18,396.08
  4. Step 4: Simplify right side
    30,971.28x = 786,325,722.74
  5. Step 5: Solve for x
    x = 786,325,722.74/30,971.28
  6. Step 6: Final answer
    x = 25,388.87

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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.