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Finding the Fourth Proportional to 20,379.76, 30,570.88 and 5,588.08

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Solution

The fourth proportional to 20,379.76, 30,570.88 and 5,588.08 is: 8,382.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,379.76 : 30,570.88 = 5,588.08 : x
  2. Step 2: Convert to fraction form
    20,379.76/30,570.88 = 5,588.08/x
  3. Step 3: Cross multiply
    20,379.76x = 30,570.88 × 5,588.08
  4. Step 4: Simplify right side
    20,379.76x = 170,832,523.11
  5. Step 5: Solve for x
    x = 170,832,523.11/20,379.76
  6. Step 6: Final answer
    x = 8,382.46

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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.