Home / 7,507.45-11,255.04-3,128.17

Finding the Fourth Proportional to 7,507.45, 11,255.04 and 3,128.17

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Solution

The fourth proportional to 7,507.45, 11,255.04 and 3,128.17 is: 4,689.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,507.45 : 11,255.04 = 3,128.17 : x
  2. Step 2: Convert to fraction form
    7,507.45/11,255.04 = 3,128.17/x
  3. Step 3: Cross multiply
    7,507.45x = 11,255.04 × 3,128.17
  4. Step 4: Simplify right side
    7,507.45x = 35,207,678.48
  5. Step 5: Solve for x
    x = 35,207,678.48/7,507.45
  6. Step 6: Final answer
    x = 4,689.70

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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.