Home / 20,511.20-28,303.74-12,012.17

Finding the Fourth Proportional to 20,511.20, 28,303.74 and 12,012.17

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Solution

The fourth proportional to 20,511.20, 28,303.74 and 12,012.17 is: 16,575.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,511.20 : 28,303.74 = 12,012.17 : x
  2. Step 2: Convert to fraction form
    20,511.20/28,303.74 = 12,012.17/x
  3. Step 3: Cross multiply
    20,511.20x = 28,303.74 × 12,012.17
  4. Step 4: Simplify right side
    20,511.20x = 339,989,336.52
  5. Step 5: Solve for x
    x = 339,989,336.52/20,511.20
  6. Step 6: Final answer
    x = 16,575.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.