Home / 13,470.14-18,589.30-7,420.64

Finding the Fourth Proportional to 13,470.14, 18,589.30 and 7,420.64

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Solution

The fourth proportional to 13,470.14, 18,589.30 and 7,420.64 is: 10,240.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,470.14 : 18,589.30 = 7,420.64 : x
  2. Step 2: Convert to fraction form
    13,470.14/18,589.30 = 7,420.64/x
  3. Step 3: Cross multiply
    13,470.14x = 18,589.30 × 7,420.64
  4. Step 4: Simplify right side
    13,470.14x = 137,944,391.65
  5. Step 5: Solve for x
    x = 137,944,391.65/13,470.14
  6. Step 6: Final answer
    x = 10,240.75

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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.