Home / 12,486.24-18,729.36-3,720.24

Finding the Fourth Proportional to 12,486.24, 18,729.36 and 3,720.24

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Solution

The fourth proportional to 12,486.24, 18,729.36 and 3,720.24 is: 5,580.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,486.24 : 18,729.36 = 3,720.24 : x
  2. Step 2: Convert to fraction form
    12,486.24/18,729.36 = 3,720.24/x
  3. Step 3: Cross multiply
    12,486.24x = 18,729.36 × 3,720.24
  4. Step 4: Simplify right side
    12,486.24x = 69,677,714.25
  5. Step 5: Solve for x
    x = 69,677,714.25/12,486.24
  6. Step 6: Final answer
    x = 5,580.36

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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.