Home / 8,421.16-12,680.71-6,245.32

Finding the Fourth Proportional to 8,421.16, 12,680.71 and 6,245.32

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Solution

The fourth proportional to 8,421.16, 12,680.71 and 6,245.32 is: 9,404.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,421.16 : 12,680.71 = 6,245.32 : x
  2. Step 2: Convert to fraction form
    8,421.16/12,680.71 = 6,245.32/x
  3. Step 3: Cross multiply
    8,421.16x = 12,680.71 × 6,245.32
  4. Step 4: Simplify right side
    8,421.16x = 79,195,091.78
  5. Step 5: Solve for x
    x = 79,195,091.78/8,421.16
  6. Step 6: Final answer
    x = 9,404.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.