Home / 21,269.63-31,909.08-8,125.76

Finding the Fourth Proportional to 21,269.63, 31,909.08 and 8,125.76

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Solution

The fourth proportional to 21,269.63, 31,909.08 and 8,125.76 is: 12,190.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,269.63 : 31,909.08 = 8,125.76 : x
  2. Step 2: Convert to fraction form
    21,269.63/31,909.08 = 8,125.76/x
  3. Step 3: Cross multiply
    21,269.63x = 31,909.08 × 8,125.76
  4. Step 4: Simplify right side
    21,269.63x = 259,285,525.90
  5. Step 5: Solve for x
    x = 259,285,525.90/21,269.63
  6. Step 6: Final answer
    x = 12,190.41

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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.