Home / 20,875.40-28,804.92-11,921.00

Finding the Fourth Proportional to 20,875.40, 28,804.92 and 11,921.00

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Solution

The fourth proportional to 20,875.40, 28,804.92 and 11,921.00 is: 16,449.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,875.40 : 28,804.92 = 11,921.00 : x
  2. Step 2: Convert to fraction form
    20,875.40/28,804.92 = 11,921.00/x
  3. Step 3: Cross multiply
    20,875.40x = 28,804.92 × 11,921.00
  4. Step 4: Simplify right side
    20,875.40x = 343,383,343.61
  5. Step 5: Solve for x
    x = 343,383,343.61/20,875.40
  6. Step 6: Final answer
    x = 16,449.19

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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.