Home / 13,391.39-18,479.81-7,423.04

Finding the Fourth Proportional to 13,391.39, 18,479.81 and 7,423.04

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Solution

The fourth proportional to 13,391.39, 18,479.81 and 7,423.04 is: 10,243.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,391.39 : 18,479.81 = 7,423.04 : x
  2. Step 2: Convert to fraction form
    13,391.39/18,479.81 = 7,423.04/x
  3. Step 3: Cross multiply
    13,391.39x = 18,479.81 × 7,423.04
  4. Step 4: Simplify right side
    13,391.39x = 137,176,433.58
  5. Step 5: Solve for x
    x = 137,176,433.58/13,391.39
  6. Step 6: Final answer
    x = 10,243.63

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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.