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Finding the Fourth Proportional to 7,390.14, 11,041.91 and 7,131.75

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Solution

The fourth proportional to 7,390.14, 11,041.91 and 7,131.75 is: 10,655.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,390.14 : 11,041.91 = 7,131.75 : x
  2. Step 2: Convert to fraction form
    7,390.14/11,041.91 = 7,131.75/x
  3. Step 3: Cross multiply
    7,390.14x = 11,041.91 × 7,131.75
  4. Step 4: Simplify right side
    7,390.14x = 78,748,141.64
  5. Step 5: Solve for x
    x = 78,748,141.64/7,390.14
  6. Step 6: Final answer
    x = 10,655.84

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.