Home / 12,135.20-18,199.46-7,686.19

Finding the Fourth Proportional to 12,135.20, 18,199.46 and 7,686.19

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Solution

The fourth proportional to 12,135.20, 18,199.46 and 7,686.19 is: 11,527.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,135.20 : 18,199.46 = 7,686.19 : x
  2. Step 2: Convert to fraction form
    12,135.20/18,199.46 = 7,686.19/x
  3. Step 3: Cross multiply
    12,135.20x = 18,199.46 × 7,686.19
  4. Step 4: Simplify right side
    12,135.20x = 139,884,549.42
  5. Step 5: Solve for x
    x = 139,884,549.42/12,135.20
  6. Step 6: Final answer
    x = 11,527.17

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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.