Home / 18,719.58-28,080.60-5,570.86

Finding the Fourth Proportional to 18,719.58, 28,080.60 and 5,570.86

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Solution

The fourth proportional to 18,719.58, 28,080.60 and 5,570.86 is: 8,356.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,719.58 : 28,080.60 = 5,570.86 : x
  2. Step 2: Convert to fraction form
    18,719.58/28,080.60 = 5,570.86/x
  3. Step 3: Cross multiply
    18,719.58x = 28,080.60 × 5,570.86
  4. Step 4: Simplify right side
    18,719.58x = 156,433,091.32
  5. Step 5: Solve for x
    x = 156,433,091.32/18,719.58
  6. Step 6: Final answer
    x = 8,356.66

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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.