Home / 12,186.16-18,279.30-4,389.40

Finding the Fourth Proportional to 12,186.16, 18,279.30 and 4,389.40

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Solution

The fourth proportional to 12,186.16, 18,279.30 and 4,389.40 is: 6,584.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,186.16 : 18,279.30 = 4,389.40 : x
  2. Step 2: Convert to fraction form
    12,186.16/18,279.30 = 4,389.40/x
  3. Step 3: Cross multiply
    12,186.16x = 18,279.30 × 4,389.40
  4. Step 4: Simplify right side
    12,186.16x = 80,235,159.42
  5. Step 5: Solve for x
    x = 80,235,159.42/12,186.16
  6. Step 6: Final answer
    x = 6,584.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.