Home / 20,281.09-27,987.77-11,328.51

Finding the Fourth Proportional to 20,281.09, 27,987.77 and 11,328.51

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Solution

The fourth proportional to 20,281.09, 27,987.77 and 11,328.51 is: 15,633.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,281.09 : 27,987.77 = 11,328.51 : x
  2. Step 2: Convert to fraction form
    20,281.09/27,987.77 = 11,328.51/x
  3. Step 3: Cross multiply
    20,281.09x = 27,987.77 × 11,328.51
  4. Step 4: Simplify right side
    20,281.09x = 317,059,732.32
  5. Step 5: Solve for x
    x = 317,059,732.32/20,281.09
  6. Step 6: Final answer
    x = 15,633.27

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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.