Home / 21,198.79-31,798.69-6,407.65

Finding the Fourth Proportional to 21,198.79, 31,798.69 and 6,407.65

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Solution

The fourth proportional to 21,198.79, 31,798.69 and 6,407.65 is: 9,611.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,198.79 : 31,798.69 = 6,407.65 : x
  2. Step 2: Convert to fraction form
    21,198.79/31,798.69 = 6,407.65/x
  3. Step 3: Cross multiply
    21,198.79x = 31,798.69 × 6,407.65
  4. Step 4: Simplify right side
    21,198.79x = 203,754,780.46
  5. Step 5: Solve for x
    x = 203,754,780.46/21,198.79
  6. Step 6: Final answer
    x = 9,611.62

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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.