Home / 7,272.40-10,912.65-3,111.70

Finding the Fourth Proportional to 7,272.40, 10,912.65 and 3,111.70

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Solution

The fourth proportional to 7,272.40, 10,912.65 and 3,111.70 is: 4,669.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,272.40 : 10,912.65 = 3,111.70 : x
  2. Step 2: Convert to fraction form
    7,272.40/10,912.65 = 3,111.70/x
  3. Step 3: Cross multiply
    7,272.40x = 10,912.65 × 3,111.70
  4. Step 4: Simplify right side
    7,272.40x = 33,956,893.01
  5. Step 5: Solve for x
    x = 33,956,893.01/7,272.40
  6. Step 6: Final answer
    x = 4,669.28

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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.