Home / 20,869.52-31,303.47-8,385.80

Finding the Fourth Proportional to 20,869.52, 31,303.47 and 8,385.80

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Solution

The fourth proportional to 20,869.52, 31,303.47 and 8,385.80 is: 12,578.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,869.52 : 31,303.47 = 8,385.80 : x
  2. Step 2: Convert to fraction form
    20,869.52/31,303.47 = 8,385.80/x
  3. Step 3: Cross multiply
    20,869.52x = 31,303.47 × 8,385.80
  4. Step 4: Simplify right side
    20,869.52x = 262,504,638.73
  5. Step 5: Solve for x
    x = 262,504,638.73/20,869.52
  6. Step 6: Final answer
    x = 12,578.37

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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.