Home / 13,928.29-19,217.72-7,878.67

Finding the Fourth Proportional to 13,928.29, 19,217.72 and 7,878.67

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Solution

The fourth proportional to 13,928.29, 19,217.72 and 7,878.67 is: 10,870.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,928.29 : 19,217.72 = 7,878.67 : x
  2. Step 2: Convert to fraction form
    13,928.29/19,217.72 = 7,878.67/x
  3. Step 3: Cross multiply
    13,928.29x = 19,217.72 × 7,878.67
  4. Step 4: Simplify right side
    13,928.29x = 151,410,045.68
  5. Step 5: Solve for x
    x = 151,410,045.68/13,928.29
  6. Step 6: Final answer
    x = 10,870.69

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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.