Home / 21,003.86-28,975.56-12,501.22

Finding the Fourth Proportional to 21,003.86, 28,975.56 and 12,501.22

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Solution

The fourth proportional to 21,003.86, 28,975.56 and 12,501.22 is: 17,245.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,003.86 : 28,975.56 = 12,501.22 : x
  2. Step 2: Convert to fraction form
    21,003.86/28,975.56 = 12,501.22/x
  3. Step 3: Cross multiply
    21,003.86x = 28,975.56 × 12,501.22
  4. Step 4: Simplify right side
    21,003.86x = 362,229,850.18
  5. Step 5: Solve for x
    x = 362,229,850.18/21,003.86
  6. Step 6: Final answer
    x = 17,245.87

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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.