Home / 14,678.07-20,255.70-8,390.44

Finding the Fourth Proportional to 14,678.07, 20,255.70 and 8,390.44

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Solution

The fourth proportional to 14,678.07, 20,255.70 and 8,390.44 is: 11,578.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,678.07 : 20,255.70 = 8,390.44 : x
  2. Step 2: Convert to fraction form
    14,678.07/20,255.70 = 8,390.44/x
  3. Step 3: Cross multiply
    14,678.07x = 20,255.70 × 8,390.44
  4. Step 4: Simplify right side
    14,678.07x = 169,954,235.51
  5. Step 5: Solve for x
    x = 169,954,235.51/14,678.07
  6. Step 6: Final answer
    x = 11,578.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.