Home / 18,913.86-28,370.82-7,808.36

Finding the Fourth Proportional to 18,913.86, 28,370.82 and 7,808.36

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Solution

The fourth proportional to 18,913.86, 28,370.82 and 7,808.36 is: 11,712.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,913.86 : 28,370.82 = 7,808.36 : x
  2. Step 2: Convert to fraction form
    18,913.86/28,370.82 = 7,808.36/x
  3. Step 3: Cross multiply
    18,913.86x = 28,370.82 × 7,808.36
  4. Step 4: Simplify right side
    18,913.86x = 221,529,576.06
  5. Step 5: Solve for x
    x = 221,529,576.06/18,913.86
  6. Step 6: Final answer
    x = 11,712.55

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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.