Home / 20,448.17-28,218.93-12,494.78

Finding the Fourth Proportional to 20,448.17, 28,218.93 and 12,494.78

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Solution

The fourth proportional to 20,448.17, 28,218.93 and 12,494.78 is: 17,243.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,448.17 : 28,218.93 = 12,494.78 : x
  2. Step 2: Convert to fraction form
    20,448.17/28,218.93 = 12,494.78/x
  3. Step 3: Cross multiply
    20,448.17x = 28,218.93 × 12,494.78
  4. Step 4: Simplify right side
    20,448.17x = 352,589,322.19
  5. Step 5: Solve for x
    x = 352,589,322.19/20,448.17
  6. Step 6: Final answer
    x = 17,243.07

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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.