Home / 13,382.10-18,461.39-9,405.81

Finding the Fourth Proportional to 13,382.10, 18,461.39 and 9,405.81

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Solution

The fourth proportional to 13,382.10, 18,461.39 and 9,405.81 is: 12,975.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,382.10 : 18,461.39 = 9,405.81 : x
  2. Step 2: Convert to fraction form
    13,382.10/18,461.39 = 9,405.81/x
  3. Step 3: Cross multiply
    13,382.10x = 18,461.39 × 9,405.81
  4. Step 4: Simplify right side
    13,382.10x = 173,644,279.65
  5. Step 5: Solve for x
    x = 173,644,279.65/13,382.10
  6. Step 6: Final answer
    x = 12,975.86

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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.