Home / 30,774.36-46,139.67-15,786

Finding the Fourth Proportional to 30,774.36, 46,139.67 and 15,786

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Solution

The fourth proportional to 30,774.36, 46,139.67 and 15,786 is: 23,667.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,774.36 : 46,139.67 = 15,786 : x
  2. Step 2: Convert to fraction form
    30,774.36/46,139.67 = 15,786/x
  3. Step 3: Cross multiply
    30,774.36x = 46,139.67 × 15,786
  4. Step 4: Simplify right side
    30,774.36x = 728,360,830.62
  5. Step 5: Solve for x
    x = 728,360,830.62/30,774.36
  6. Step 6: Final answer
    x = 23,667.78

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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.