Home / 20,449.60-28,218.40-11,495.68

Finding the Fourth Proportional to 20,449.60, 28,218.40 and 11,495.68

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Solution

The fourth proportional to 20,449.60, 28,218.40 and 11,495.68 is: 15,862.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,449.60 : 28,218.40 = 11,495.68 : x
  2. Step 2: Convert to fraction form
    20,449.60/28,218.40 = 11,495.68/x
  3. Step 3: Cross multiply
    20,449.60x = 28,218.40 × 11,495.68
  4. Step 4: Simplify right side
    20,449.60x = 324,389,696.51
  5. Step 5: Solve for x
    x = 324,389,696.51/20,449.60
  6. Step 6: Final answer
    x = 15,862.89

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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.