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Finding the Fourth Proportional to 12,405.47, 17,119.85 and 7,101.99

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Solution

The fourth proportional to 12,405.47, 17,119.85 and 7,101.99 is: 9,800.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,405.47 : 17,119.85 = 7,101.99 : x
  2. Step 2: Convert to fraction form
    12,405.47/17,119.85 = 7,101.99/x
  3. Step 3: Cross multiply
    12,405.47x = 17,119.85 × 7,101.99
  4. Step 4: Simplify right side
    12,405.47x = 121,584,967.99
  5. Step 5: Solve for x
    x = 121,584,967.99/12,405.47
  6. Step 6: Final answer
    x = 9,800.92

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