Home / 21,311.93-31,966.76-6,520.86

Finding the Fourth Proportional to 21,311.93, 31,966.76 and 6,520.86

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Solution

The fourth proportional to 21,311.93, 31,966.76 and 6,520.86 is: 9,780.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,311.93 : 31,966.76 = 6,520.86 : x
  2. Step 2: Convert to fraction form
    21,311.93/31,966.76 = 6,520.86/x
  3. Step 3: Cross multiply
    21,311.93x = 31,966.76 × 6,520.86
  4. Step 4: Simplify right side
    21,311.93x = 208,450,782.92
  5. Step 5: Solve for x
    x = 208,450,782.92/21,311.93
  6. Step 6: Final answer
    x = 9,780.94

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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.