Home / 21,309.86-31,980.59-17,199.11

Finding the Fourth Proportional to 21,309.86, 31,980.59 and 17,199.11

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Solution

The fourth proportional to 21,309.86, 31,980.59 and 17,199.11 is: 25,811.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,309.86 : 31,980.59 = 17,199.11 : x
  2. Step 2: Convert to fraction form
    21,309.86/31,980.59 = 17,199.11/x
  3. Step 3: Cross multiply
    21,309.86x = 31,980.59 × 17,199.11
  4. Step 4: Simplify right side
    21,309.86x = 550,037,685.27
  5. Step 5: Solve for x
    x = 550,037,685.27/21,309.86
  6. Step 6: Final answer
    x = 25,811.42

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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.