Home / 13,387.85-18,474.91-7,722.61

Finding the Fourth Proportional to 13,387.85, 18,474.91 and 7,722.61

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Solution

The fourth proportional to 13,387.85, 18,474.91 and 7,722.61 is: 10,657.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,387.85 : 18,474.91 = 7,722.61 : x
  2. Step 2: Convert to fraction form
    13,387.85/18,474.91 = 7,722.61/x
  3. Step 3: Cross multiply
    13,387.85x = 18,474.91 × 7,722.61
  4. Step 4: Simplify right side
    13,387.85x = 142,674,524.72
  5. Step 5: Solve for x
    x = 142,674,524.72/13,387.85
  6. Step 6: Final answer
    x = 10,657.02

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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.