Home / 20,720.09-28,597.16-12,224.29

Finding the Fourth Proportional to 20,720.09, 28,597.16 and 12,224.29

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Solution

The fourth proportional to 20,720.09, 28,597.16 and 12,224.29 is: 16,871.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,720.09 : 28,597.16 = 12,224.29 : x
  2. Step 2: Convert to fraction form
    20,720.09/28,597.16 = 12,224.29/x
  3. Step 3: Cross multiply
    20,720.09x = 28,597.16 × 12,224.29
  4. Step 4: Simplify right side
    20,720.09x = 349,579,951.64
  5. Step 5: Solve for x
    x = 349,579,951.64/20,720.09
  6. Step 6: Final answer
    x = 16,871.54

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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.