Home / 21,009.60-31,489.92-16,875.36

Finding the Fourth Proportional to 21,009.60, 31,489.92 and 16,875.36

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Solution

The fourth proportional to 21,009.60, 31,489.92 and 16,875.36 is: 25,293.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,009.60 : 31,489.92 = 16,875.36 : x
  2. Step 2: Convert to fraction form
    21,009.60/31,489.92 = 16,875.36/x
  3. Step 3: Cross multiply
    21,009.60x = 31,489.92 × 16,875.36
  4. Step 4: Simplify right side
    21,009.60x = 531,403,736.37
  5. Step 5: Solve for x
    x = 531,403,736.37/21,009.60
  6. Step 6: Final answer
    x = 25,293.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.