Home / 19,856.09-27,397.87-13,139.26

Finding the Fourth Proportional to 19,856.09, 27,397.87 and 13,139.26

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Solution

The fourth proportional to 19,856.09, 27,397.87 and 13,139.26 is: 18,129.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,856.09 : 27,397.87 = 13,139.26 : x
  2. Step 2: Convert to fraction form
    19,856.09/27,397.87 = 13,139.26/x
  3. Step 3: Cross multiply
    19,856.09x = 27,397.87 × 13,139.26
  4. Step 4: Simplify right side
    19,856.09x = 359,987,636.03
  5. Step 5: Solve for x
    x = 359,987,636.03/19,856.09
  6. Step 6: Final answer
    x = 18,129.83

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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.