Home / 13,419.23-18,518.40-7,450.75

Finding the Fourth Proportional to 13,419.23, 18,518.40 and 7,450.75

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Solution

The fourth proportional to 13,419.23, 18,518.40 and 7,450.75 is: 10,281.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,419.23 : 18,518.40 = 7,450.75 : x
  2. Step 2: Convert to fraction form
    13,419.23/18,518.40 = 7,450.75/x
  3. Step 3: Cross multiply
    13,419.23x = 18,518.40 × 7,450.75
  4. Step 4: Simplify right side
    13,419.23x = 137,975,968.80
  5. Step 5: Solve for x
    x = 137,975,968.80/13,419.23
  6. Step 6: Final answer
    x = 10,281.96

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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.