Home / 20,975.52-31,467.60-7,824.72

Finding the Fourth Proportional to 20,975.52, 31,467.60 and 7,824.72

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Solution

The fourth proportional to 20,975.52, 31,467.60 and 7,824.72 is: 11,738.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,975.52 : 31,467.60 = 7,824.72 : x
  2. Step 2: Convert to fraction form
    20,975.52/31,467.60 = 7,824.72/x
  3. Step 3: Cross multiply
    20,975.52x = 31,467.60 × 7,824.72
  4. Step 4: Simplify right side
    20,975.52x = 246,225,159.07
  5. Step 5: Solve for x
    x = 246,225,159.07/20,975.52
  6. Step 6: Final answer
    x = 11,738.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.