Home / 8,638.08-12,956.16-3,091.20

Finding the Fourth Proportional to 8,638.08, 12,956.16 and 3,091.20

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Solution

The fourth proportional to 8,638.08, 12,956.16 and 3,091.20 is: 4,636.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,638.08 : 12,956.16 = 3,091.20 : x
  2. Step 2: Convert to fraction form
    8,638.08/12,956.16 = 3,091.20/x
  3. Step 3: Cross multiply
    8,638.08x = 12,956.16 × 3,091.20
  4. Step 4: Simplify right side
    8,638.08x = 40,050,081.79
  5. Step 5: Solve for x
    x = 40,050,081.79/8,638.08
  6. Step 6: Final answer
    x = 4,636.46

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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.