Home / 20,643.82-28,490.88-12,260.32

Finding the Fourth Proportional to 20,643.82, 28,490.88 and 12,260.32

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Solution

The fourth proportional to 20,643.82, 28,490.88 and 12,260.32 is: 16,920.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,643.82 : 28,490.88 = 12,260.32 : x
  2. Step 2: Convert to fraction form
    20,643.82/28,490.88 = 12,260.32/x
  3. Step 3: Cross multiply
    20,643.82x = 28,490.88 × 12,260.32
  4. Step 4: Simplify right side
    20,643.82x = 349,307,305.88
  5. Step 5: Solve for x
    x = 349,307,305.88/20,643.82
  6. Step 6: Final answer
    x = 16,920.67

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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.