Home / 8,657.36-12,988.36-3,111.30

Finding the Fourth Proportional to 8,657.36, 12,988.36 and 3,111.30

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Solution

The fourth proportional to 8,657.36, 12,988.36 and 3,111.30 is: 4,667.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,657.36 : 12,988.36 = 3,111.30 : x
  2. Step 2: Convert to fraction form
    8,657.36/12,988.36 = 3,111.30/x
  3. Step 3: Cross multiply
    8,657.36x = 12,988.36 × 3,111.30
  4. Step 4: Simplify right side
    8,657.36x = 40,410,684.47
  5. Step 5: Solve for x
    x = 40,410,684.47/8,657.36
  6. Step 6: Final answer
    x = 4,667.78

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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.