Home / 9,289.37-12,820.20-5,309.72

Finding the Fourth Proportional to 9,289.37, 12,820.20 and 5,309.72

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Solution

The fourth proportional to 9,289.37, 12,820.20 and 5,309.72 is: 7,327.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,289.37 : 12,820.20 = 5,309.72 : x
  2. Step 2: Convert to fraction form
    9,289.37/12,820.20 = 5,309.72/x
  3. Step 3: Cross multiply
    9,289.37x = 12,820.20 × 5,309.72
  4. Step 4: Simplify right side
    9,289.37x = 68,071,608.24
  5. Step 5: Solve for x
    x = 68,071,608.24/9,289.37
  6. Step 6: Final answer
    x = 7,327.91

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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.