Home / 13,239.86-18,272.09-7,272.68

Finding the Fourth Proportional to 13,239.86, 18,272.09 and 7,272.68

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Solution

The fourth proportional to 13,239.86, 18,272.09 and 7,272.68 is: 10,036.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,239.86 : 18,272.09 = 7,272.68 : x
  2. Step 2: Convert to fraction form
    13,239.86/18,272.09 = 7,272.68/x
  3. Step 3: Cross multiply
    13,239.86x = 18,272.09 × 7,272.68
  4. Step 4: Simplify right side
    13,239.86x = 132,887,027.14
  5. Step 5: Solve for x
    x = 132,887,027.14/13,239.86
  6. Step 6: Final answer
    x = 10,036.89

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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.