Home / 21,021.99-31,515.90-8,547.85

Finding the Fourth Proportional to 21,021.99, 31,515.90 and 8,547.85

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Solution

The fourth proportional to 21,021.99, 31,515.90 and 8,547.85 is: 12,814.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,021.99 : 31,515.90 = 8,547.85 : x
  2. Step 2: Convert to fraction form
    21,021.99/31,515.90 = 8,547.85/x
  3. Step 3: Cross multiply
    21,021.99x = 31,515.90 × 8,547.85
  4. Step 4: Simplify right side
    21,021.99x = 269,393,185.82
  5. Step 5: Solve for x
    x = 269,393,185.82/21,021.99
  6. Step 6: Final answer
    x = 12,814.83

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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.