Home / 12,812.40-19,218.60-3,578.40

Finding the Fourth Proportional to 12,812.40, 19,218.60 and 3,578.40

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Solution

The fourth proportional to 12,812.40, 19,218.60 and 3,578.40 is: 5,367.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,812.40 : 19,218.60 = 3,578.40 : x
  2. Step 2: Convert to fraction form
    12,812.40/19,218.60 = 3,578.40/x
  3. Step 3: Cross multiply
    12,812.40x = 19,218.60 × 3,578.40
  4. Step 4: Simplify right side
    12,812.40x = 68,771,838.24
  5. Step 5: Solve for x
    x = 68,771,838.24/12,812.40
  6. Step 6: Final answer
    x = 5,367.60

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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.