Home / 12,619.54-18,931.53-5,219.85

Finding the Fourth Proportional to 12,619.54, 18,931.53 and 5,219.85

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Solution

The fourth proportional to 12,619.54, 18,931.53 and 5,219.85 is: 7,830.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,619.54 : 18,931.53 = 5,219.85 : x
  2. Step 2: Convert to fraction form
    12,619.54/18,931.53 = 5,219.85/x
  3. Step 3: Cross multiply
    12,619.54x = 18,931.53 × 5,219.85
  4. Step 4: Simplify right side
    12,619.54x = 98,819,746.87
  5. Step 5: Solve for x
    x = 98,819,746.87/12,619.54
  6. Step 6: Final answer
    x = 7,830.69

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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.