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Finding the Fourth Proportional to 9,405.01, 12,979.04 and 5,155.98

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Solution

The fourth proportional to 9,405.01, 12,979.04 and 5,155.98 is: 7,115.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,405.01 : 12,979.04 = 5,155.98 : x
  2. Step 2: Convert to fraction form
    9,405.01/12,979.04 = 5,155.98/x
  3. Step 3: Cross multiply
    9,405.01x = 12,979.04 × 5,155.98
  4. Step 4: Simplify right side
    9,405.01x = 66,919,670.66
  5. Step 5: Solve for x
    x = 66,919,670.66/9,405.01
  6. Step 6: Final answer
    x = 7,115.32

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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.