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Finding the Fourth Proportional to 7,188.84, 9,910.44 and 7,090.20

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Solution

The fourth proportional to 7,188.84, 9,910.44 and 7,090.20 is: 9,774.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,188.84 : 9,910.44 = 7,090.20 : x
  2. Step 2: Convert to fraction form
    7,188.84/9,910.44 = 7,090.20/x
  3. Step 3: Cross multiply
    7,188.84x = 9,910.44 × 7,090.20
  4. Step 4: Simplify right side
    7,188.84x = 70,267,001.69
  5. Step 5: Solve for x
    x = 70,267,001.69/7,188.84
  6. Step 6: Final answer
    x = 9,774.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.