Home / 13,118.90-18,104.51-7,812.99

Finding the Fourth Proportional to 13,118.90, 18,104.51 and 7,812.99

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Solution

The fourth proportional to 13,118.90, 18,104.51 and 7,812.99 is: 10,782.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,118.90 : 18,104.51 = 7,812.99 : x
  2. Step 2: Convert to fraction form
    13,118.90/18,104.51 = 7,812.99/x
  3. Step 3: Cross multiply
    13,118.90x = 18,104.51 × 7,812.99
  4. Step 4: Simplify right side
    13,118.90x = 141,450,375.12
  5. Step 5: Solve for x
    x = 141,450,375.12/13,118.90
  6. Step 6: Final answer
    x = 10,782.19

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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.