Home / 13,259.88-19,890.42-6,678.21

Finding the Fourth Proportional to 13,259.88, 19,890.42 and 6,678.21

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Solution

The fourth proportional to 13,259.88, 19,890.42 and 6,678.21 is: 10,017.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,259.88 : 19,890.42 = 6,678.21 : x
  2. Step 2: Convert to fraction form
    13,259.88/19,890.42 = 6,678.21/x
  3. Step 3: Cross multiply
    13,259.88x = 19,890.42 × 6,678.21
  4. Step 4: Simplify right side
    13,259.88x = 132,832,401.75
  5. Step 5: Solve for x
    x = 132,832,401.75/13,259.88
  6. Step 6: Final answer
    x = 10,017.62

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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.