Home / 13,146.96-18,121.16-9,319.86

Finding the Fourth Proportional to 13,146.96, 18,121.16 and 9,319.86

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Solution

The fourth proportional to 13,146.96, 18,121.16 and 9,319.86 is: 12,846.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,146.96 : 18,121.16 = 9,319.86 : x
  2. Step 2: Convert to fraction form
    13,146.96/18,121.16 = 9,319.86/x
  3. Step 3: Cross multiply
    13,146.96x = 18,121.16 × 9,319.86
  4. Step 4: Simplify right side
    13,146.96x = 168,886,674.24
  5. Step 5: Solve for x
    x = 168,886,674.24/13,146.96
  6. Step 6: Final answer
    x = 12,846.06

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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.