Home / 8,659.10-12,980.85-3,111.14

Finding the Fourth Proportional to 8,659.10, 12,980.85 and 3,111.14

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Solution

The fourth proportional to 8,659.10, 12,980.85 and 3,111.14 is: 4,663.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,659.10 : 12,980.85 = 3,111.14 : x
  2. Step 2: Convert to fraction form
    8,659.10/12,980.85 = 3,111.14/x
  3. Step 3: Cross multiply
    8,659.10x = 12,980.85 × 3,111.14
  4. Step 4: Simplify right side
    8,659.10x = 40,385,176.76
  5. Step 5: Solve for x
    x = 40,385,176.76/8,659.10
  6. Step 6: Final answer
    x = 4,663.90

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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.