Home / 12,782.07-19,138.95-7,227.09

Finding the Fourth Proportional to 12,782.07, 19,138.95 and 7,227.09

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Solution

The fourth proportional to 12,782.07, 19,138.95 and 7,227.09 is: 10,821.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,782.07 : 19,138.95 = 7,227.09 : x
  2. Step 2: Convert to fraction form
    12,782.07/19,138.95 = 7,227.09/x
  3. Step 3: Cross multiply
    12,782.07x = 19,138.95 × 7,227.09
  4. Step 4: Simplify right side
    12,782.07x = 138,318,914.16
  5. Step 5: Solve for x
    x = 138,318,914.16/12,782.07
  6. Step 6: Final answer
    x = 10,821.32

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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.