Home / 9,378.39-12,943.40-5,399.67

Finding the Fourth Proportional to 9,378.39, 12,943.40 and 5,399.67

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Solution

The fourth proportional to 9,378.39, 12,943.40 and 5,399.67 is: 7,452.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,378.39 : 12,943.40 = 5,399.67 : x
  2. Step 2: Convert to fraction form
    9,378.39/12,943.40 = 5,399.67/x
  3. Step 3: Cross multiply
    9,378.39x = 12,943.40 × 5,399.67
  4. Step 4: Simplify right side
    9,378.39x = 69,890,088.68
  5. Step 5: Solve for x
    x = 69,890,088.68/9,378.39
  6. Step 6: Final answer
    x = 7,452.25

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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.