Home / 12,015.12-18,028.08-7,631.40

Finding the Fourth Proportional to 12,015.12, 18,028.08 and 7,631.40

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Solution

The fourth proportional to 12,015.12, 18,028.08 and 7,631.40 is: 11,450.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,015.12 : 18,028.08 = 7,631.40 : x
  2. Step 2: Convert to fraction form
    12,015.12/18,028.08 = 7,631.40/x
  3. Step 3: Cross multiply
    12,015.12x = 18,028.08 × 7,631.40
  4. Step 4: Simplify right side
    12,015.12x = 137,579,489.71
  5. Step 5: Solve for x
    x = 137,579,489.71/12,015.12
  6. Step 6: Final answer
    x = 11,450.53

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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.