Home / 20,887.10-31,323.35-8,403.88

Finding the Fourth Proportional to 20,887.10, 31,323.35 and 8,403.88

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Solution

The fourth proportional to 20,887.10, 31,323.35 and 8,403.88 is: 12,602.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,887.10 : 31,323.35 = 8,403.88 : x
  2. Step 2: Convert to fraction form
    20,887.10/31,323.35 = 8,403.88/x
  3. Step 3: Cross multiply
    20,887.10x = 31,323.35 × 8,403.88
  4. Step 4: Simplify right side
    20,887.10x = 263,237,674.60
  5. Step 5: Solve for x
    x = 263,237,674.60/20,887.10
  6. Step 6: Final answer
    x = 12,602.88

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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.