Home / 20,940.08-31,402.08-8,455.76

Finding the Fourth Proportional to 20,940.08, 31,402.08 and 8,455.76

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Solution

The fourth proportional to 20,940.08, 31,402.08 and 8,455.76 is: 12,680.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,940.08 : 31,402.08 = 8,455.76 : x
  2. Step 2: Convert to fraction form
    20,940.08/31,402.08 = 8,455.76/x
  3. Step 3: Cross multiply
    20,940.08x = 31,402.08 × 8,455.76
  4. Step 4: Simplify right side
    20,940.08x = 265,528,451.98
  5. Step 5: Solve for x
    x = 265,528,451.98/20,940.08
  6. Step 6: Final answer
    x = 12,680.39

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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.