Home / 20,649.64-28,497.12-11,218.84

Finding the Fourth Proportional to 20,649.64, 28,497.12 and 11,218.84

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Solution

The fourth proportional to 20,649.64, 28,497.12 and 11,218.84 is: 15,482.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,649.64 : 28,497.12 = 11,218.84 : x
  2. Step 2: Convert to fraction form
    20,649.64/28,497.12 = 11,218.84/x
  3. Step 3: Cross multiply
    20,649.64x = 28,497.12 × 11,218.84
  4. Step 4: Simplify right side
    20,649.64x = 319,704,629.74
  5. Step 5: Solve for x
    x = 319,704,629.74/20,649.64
  6. Step 6: Final answer
    x = 15,482.33

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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.