Home / 20,953.75-31,430.78-6,162.88

Finding the Fourth Proportional to 20,953.75, 31,430.78 and 6,162.88

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Solution

The fourth proportional to 20,953.75, 31,430.78 and 6,162.88 is: 9,244.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,953.75 : 31,430.78 = 6,162.88 : x
  2. Step 2: Convert to fraction form
    20,953.75/31,430.78 = 6,162.88/x
  3. Step 3: Cross multiply
    20,953.75x = 31,430.78 × 6,162.88
  4. Step 4: Simplify right side
    20,953.75x = 193,704,125.45
  5. Step 5: Solve for x
    x = 193,704,125.45/20,953.75
  6. Step 6: Final answer
    x = 9,244.37

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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.