Home / 13,128.24-18,117.24-7,539.12

Finding the Fourth Proportional to 13,128.24, 18,117.24 and 7,539.12

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Solution

The fourth proportional to 13,128.24, 18,117.24 and 7,539.12 is: 10,404.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,128.24 : 18,117.24 = 7,539.12 : x
  2. Step 2: Convert to fraction form
    13,128.24/18,117.24 = 7,539.12/x
  3. Step 3: Cross multiply
    13,128.24x = 18,117.24 × 7,539.12
  4. Step 4: Simplify right side
    13,128.24x = 136,588,046.43
  5. Step 5: Solve for x
    x = 136,588,046.43/13,128.24
  6. Step 6: Final answer
    x = 10,404.14

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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.