Home / 9,339.20-12,888.09-5,147.45

Finding the Fourth Proportional to 9,339.20, 12,888.09 and 5,147.45

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Solution

The fourth proportional to 9,339.20, 12,888.09 and 5,147.45 is: 7,103.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,339.20 : 12,888.09 = 5,147.45 : x
  2. Step 2: Convert to fraction form
    9,339.20/12,888.09 = 5,147.45/x
  3. Step 3: Cross multiply
    9,339.20x = 12,888.09 × 5,147.45
  4. Step 4: Simplify right side
    9,339.20x = 66,340,734.43
  5. Step 5: Solve for x
    x = 66,340,734.43/9,339.20
  6. Step 6: Final answer
    x = 7,103.47

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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.