Home / 10,908.80-15,054.21-6,128.78

Finding the Fourth Proportional to 10,908.80, 15,054.21 and 6,128.78

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Solution

The fourth proportional to 10,908.80, 15,054.21 and 6,128.78 is: 8,457.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,908.80 : 15,054.21 = 6,128.78 : x
  2. Step 2: Convert to fraction form
    10,908.80/15,054.21 = 6,128.78/x
  3. Step 3: Cross multiply
    10,908.80x = 15,054.21 × 6,128.78
  4. Step 4: Simplify right side
    10,908.80x = 92,263,941.16
  5. Step 5: Solve for x
    x = 92,263,941.16/10,908.80
  6. Step 6: Final answer
    x = 8,457.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.