Home / 19,109.07-28,696.14-12,456.90

Finding the Fourth Proportional to 19,109.07, 28,696.14 and 12,456.90

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Solution

The fourth proportional to 19,109.07, 28,696.14 and 12,456.90 is: 18,706.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,109.07 : 28,696.14 = 12,456.90 : x
  2. Step 2: Convert to fraction form
    19,109.07/28,696.14 = 12,456.90/x
  3. Step 3: Cross multiply
    19,109.07x = 28,696.14 × 12,456.90
  4. Step 4: Simplify right side
    19,109.07x = 357,464,946.37
  5. Step 5: Solve for x
    x = 357,464,946.37/19,109.07
  6. Step 6: Final answer
    x = 18,706.56

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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.