Home / 20,993.04-31,490.71-8,511.21

Finding the Fourth Proportional to 20,993.04, 31,490.71 and 8,511.21

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Solution

The fourth proportional to 20,993.04, 31,490.71 and 8,511.21 is: 12,767.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,993.04 : 31,490.71 = 8,511.21 : x
  2. Step 2: Convert to fraction form
    20,993.04/31,490.71 = 8,511.21/x
  3. Step 3: Cross multiply
    20,993.04x = 31,490.71 × 8,511.21
  4. Step 4: Simplify right side
    20,993.04x = 268,024,024.58
  5. Step 5: Solve for x
    x = 268,024,024.58/20,993.04
  6. Step 6: Final answer
    x = 12,767.28

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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.