Home / 13,002.78-19,511.43-5,212.20

Finding the Fourth Proportional to 13,002.78, 19,511.43 and 5,212.20

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Solution

The fourth proportional to 13,002.78, 19,511.43 and 5,212.20 is: 7,821.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,002.78 : 19,511.43 = 5,212.20 : x
  2. Step 2: Convert to fraction form
    13,002.78/19,511.43 = 5,212.20/x
  3. Step 3: Cross multiply
    13,002.78x = 19,511.43 × 5,212.20
  4. Step 4: Simplify right side
    13,002.78x = 101,697,475.45
  5. Step 5: Solve for x
    x = 101,697,475.45/13,002.78
  6. Step 6: Final answer
    x = 7,821.21

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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.