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Finding the Fourth Proportional to 12,309.88, 18,376.13 and 11,435.08

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Solution

The fourth proportional to 12,309.88, 18,376.13 and 11,435.08 is: 17,070.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,309.88 : 18,376.13 = 11,435.08 : x
  2. Step 2: Convert to fraction form
    12,309.88/18,376.13 = 11,435.08/x
  3. Step 3: Cross multiply
    12,309.88x = 18,376.13 × 11,435.08
  4. Step 4: Simplify right side
    12,309.88x = 210,132,516.64
  5. Step 5: Solve for x
    x = 210,132,516.64/12,309.88
  6. Step 6: Final answer
    x = 17,070.23

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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.