Home / 20,412.71-28,169.43-11,460.21

Finding the Fourth Proportional to 20,412.71, 28,169.43 and 11,460.21

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Solution

The fourth proportional to 20,412.71, 28,169.43 and 11,460.21 is: 15,815.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,412.71 : 28,169.43 = 11,460.21 : x
  2. Step 2: Convert to fraction form
    20,412.71/28,169.43 = 11,460.21/x
  3. Step 3: Cross multiply
    20,412.71x = 28,169.43 × 11,460.21
  4. Step 4: Simplify right side
    20,412.71x = 322,827,583.38
  5. Step 5: Solve for x
    x = 322,827,583.38/20,412.71
  6. Step 6: Final answer
    x = 15,815.03

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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.