Home / 12,159.66-18,238.53-7,480.29

Finding the Fourth Proportional to 12,159.66, 18,238.53 and 7,480.29

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Solution

The fourth proportional to 12,159.66, 18,238.53 and 7,480.29 is: 11,219.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,159.66 : 18,238.53 = 7,480.29 : x
  2. Step 2: Convert to fraction form
    12,159.66/18,238.53 = 7,480.29/x
  3. Step 3: Cross multiply
    12,159.66x = 18,238.53 × 7,480.29
  4. Step 4: Simplify right side
    12,159.66x = 136,429,493.57
  5. Step 5: Solve for x
    x = 136,429,493.57/12,159.66
  6. Step 6: Final answer
    x = 11,219.84

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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.