Home / 20,987.00-28,961.48-11,427.07

Finding the Fourth Proportional to 20,987.00, 28,961.48 and 11,427.07

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Solution

The fourth proportional to 20,987.00, 28,961.48 and 11,427.07 is: 15,769.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,987.00 : 28,961.48 = 11,427.07 : x
  2. Step 2: Convert to fraction form
    20,987.00/28,961.48 = 11,427.07/x
  3. Step 3: Cross multiply
    20,987.00x = 28,961.48 × 11,427.07
  4. Step 4: Simplify right side
    20,987.00x = 330,944,859.26
  5. Step 5: Solve for x
    x = 330,944,859.26/20,987.00
  6. Step 6: Final answer
    x = 15,769.04

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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.