Home / 20,580.13-30,878.31-8,736.46

Finding the Fourth Proportional to 20,580.13, 30,878.31 and 8,736.46

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Solution

The fourth proportional to 20,580.13, 30,878.31 and 8,736.46 is: 13,108.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,580.13 : 30,878.31 = 8,736.46 : x
  2. Step 2: Convert to fraction form
    20,580.13/30,878.31 = 8,736.46/x
  3. Step 3: Cross multiply
    20,580.13x = 30,878.31 × 8,736.46
  4. Step 4: Simplify right side
    20,580.13x = 269,767,075.75
  5. Step 5: Solve for x
    x = 269,767,075.75/20,580.13
  6. Step 6: Final answer
    x = 13,108.14

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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.