Home / 20,319.85-30,479.57-5,528.64

Finding the Fourth Proportional to 20,319.85, 30,479.57 and 5,528.64

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Solution

The fourth proportional to 20,319.85, 30,479.57 and 5,528.64 is: 8,292.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,319.85 : 30,479.57 = 5,528.64 : x
  2. Step 2: Convert to fraction form
    20,319.85/30,479.57 = 5,528.64/x
  3. Step 3: Cross multiply
    20,319.85x = 30,479.57 × 5,528.64
  4. Step 4: Simplify right side
    20,319.85x = 168,510,569.88
  5. Step 5: Solve for x
    x = 168,510,569.88/20,319.85
  6. Step 6: Final answer
    x = 8,292.90

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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.