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Finding the Fourth Proportional to 9,405.86, 12,980.07 and 5,214.11

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Solution

The fourth proportional to 9,405.86, 12,980.07 and 5,214.11 is: 7,195.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,405.86 : 12,980.07 = 5,214.11 : x
  2. Step 2: Convert to fraction form
    9,405.86/12,980.07 = 5,214.11/x
  3. Step 3: Cross multiply
    9,405.86x = 12,980.07 × 5,214.11
  4. Step 4: Simplify right side
    9,405.86x = 67,679,447.89
  5. Step 5: Solve for x
    x = 67,679,447.89/9,405.86
  6. Step 6: Final answer
    x = 7,195.46

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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.