Home / 13,396.12-18,486.87-7,428.04

Finding the Fourth Proportional to 13,396.12, 18,486.87 and 7,428.04

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Solution

The fourth proportional to 13,396.12, 18,486.87 and 7,428.04 is: 10,250.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,396.12 : 18,486.87 = 7,428.04 : x
  2. Step 2: Convert to fraction form
    13,396.12/18,486.87 = 7,428.04/x
  3. Step 3: Cross multiply
    13,396.12x = 18,486.87 × 7,428.04
  4. Step 4: Simplify right side
    13,396.12x = 137,321,135.76
  5. Step 5: Solve for x
    x = 137,321,135.76/13,396.12
  6. Step 6: Final answer
    x = 10,250.82

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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.