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Finding the Fourth Proportional to 7,145.28, 10,722.78 and 7,090.74

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Solution

The fourth proportional to 7,145.28, 10,722.78 and 7,090.74 is: 10,640.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,145.28 : 10,722.78 = 7,090.74 : x
  2. Step 2: Convert to fraction form
    7,145.28/10,722.78 = 7,090.74/x
  3. Step 3: Cross multiply
    7,145.28x = 10,722.78 × 7,090.74
  4. Step 4: Simplify right side
    7,145.28x = 76,032,445.06
  5. Step 5: Solve for x
    x = 76,032,445.06/7,145.28
  6. Step 6: Final answer
    x = 10,640.93

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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.