Home / 8,955.16-13,438.86-3,111.72

Finding the Fourth Proportional to 8,955.16, 13,438.86 and 3,111.72

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Solution

The fourth proportional to 8,955.16, 13,438.86 and 3,111.72 is: 4,669.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,955.16 : 13,438.86 = 3,111.72 : x
  2. Step 2: Convert to fraction form
    8,955.16/13,438.86 = 3,111.72/x
  3. Step 3: Cross multiply
    8,955.16x = 13,438.86 × 3,111.72
  4. Step 4: Simplify right side
    8,955.16x = 41,817,969.44
  5. Step 5: Solve for x
    x = 41,817,969.44/8,955.16
  6. Step 6: Final answer
    x = 4,669.71

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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.