Home / 15,072.64-20,796.48-8,782.72

Finding the Fourth Proportional to 15,072.64, 20,796.48 and 8,782.72

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Solution

The fourth proportional to 15,072.64, 20,796.48 and 8,782.72 is: 12,117.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,072.64 : 20,796.48 = 8,782.72 : x
  2. Step 2: Convert to fraction form
    15,072.64/20,796.48 = 8,782.72/x
  3. Step 3: Cross multiply
    15,072.64x = 20,796.48 × 8,782.72
  4. Step 4: Simplify right side
    15,072.64x = 182,649,660.83
  5. Step 5: Solve for x
    x = 182,649,660.83/15,072.64
  6. Step 6: Final answer
    x = 12,117.96

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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.