Home / 7,513.70-11,261.55-3,128.90

Finding the Fourth Proportional to 7,513.70, 11,261.55 and 3,128.90

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Solution

The fourth proportional to 7,513.70, 11,261.55 and 3,128.90 is: 4,689.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,513.70 : 11,261.55 = 3,128.90 : x
  2. Step 2: Convert to fraction form
    7,513.70/11,261.55 = 3,128.90/x
  3. Step 3: Cross multiply
    7,513.70x = 11,261.55 × 3,128.90
  4. Step 4: Simplify right side
    7,513.70x = 35,236,263.80
  5. Step 5: Solve for x
    x = 35,236,263.80/7,513.70
  6. Step 6: Final answer
    x = 4,689.60

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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.