Home / 20,505.56-28,312.84-12,558.62

Finding the Fourth Proportional to 20,505.56, 28,312.84 and 12,558.62

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Solution

The fourth proportional to 20,505.56, 28,312.84 and 12,558.62 is: 17,340.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,505.56 : 28,312.84 = 12,558.62 : x
  2. Step 2: Convert to fraction form
    20,505.56/28,312.84 = 12,558.62/x
  3. Step 3: Cross multiply
    20,505.56x = 28,312.84 × 12,558.62
  4. Step 4: Simplify right side
    20,505.56x = 355,570,198.68
  5. Step 5: Solve for x
    x = 355,570,198.68/20,505.56
  6. Step 6: Final answer
    x = 17,340.18

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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.