Home / 21,009.46-31,520.30-6,218.76

Finding the Fourth Proportional to 21,009.46, 31,520.30 and 6,218.76

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Solution

The fourth proportional to 21,009.46, 31,520.30 and 6,218.76 is: 9,329.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,009.46 : 31,520.30 = 6,218.76 : x
  2. Step 2: Convert to fraction form
    21,009.46/31,520.30 = 6,218.76/x
  3. Step 3: Cross multiply
    21,009.46x = 31,520.30 × 6,218.76
  4. Step 4: Simplify right side
    21,009.46x = 196,017,180.83
  5. Step 5: Solve for x
    x = 196,017,180.83/21,009.46
  6. Step 6: Final answer
    x = 9,329.95

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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.