Home / 30,231.40-45,355.38-9,172.12

Finding the Fourth Proportional to 30,231.40, 45,355.38 and 9,172.12

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Solution

The fourth proportional to 30,231.40, 45,355.38 and 9,172.12 is: 13,760.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,231.40 : 45,355.38 = 9,172.12 : x
  2. Step 2: Convert to fraction form
    30,231.40/45,355.38 = 9,172.12/x
  3. Step 3: Cross multiply
    30,231.40x = 45,355.38 × 9,172.12
  4. Step 4: Simplify right side
    30,231.40x = 416,004,988.01
  5. Step 5: Solve for x
    x = 416,004,988.01/30,231.40
  6. Step 6: Final answer
    x = 13,760.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.