Home / 20,876.75-31,307.36-8,392.58

Finding the Fourth Proportional to 20,876.75, 31,307.36 and 8,392.58

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Solution

The fourth proportional to 20,876.75, 31,307.36 and 8,392.58 is: 12,585.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,876.75 : 31,307.36 = 8,392.58 : x
  2. Step 2: Convert to fraction form
    20,876.75/31,307.36 = 8,392.58/x
  3. Step 3: Cross multiply
    20,876.75x = 31,307.36 × 8,392.58
  4. Step 4: Simplify right side
    20,876.75x = 262,749,324.89
  5. Step 5: Solve for x
    x = 262,749,324.89/20,876.75
  6. Step 6: Final answer
    x = 12,585.74

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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.