Home / 20,718.81-28,593.96-12,765.69

Finding the Fourth Proportional to 20,718.81, 28,593.96 and 12,765.69

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Solution

The fourth proportional to 20,718.81, 28,593.96 and 12,765.69 is: 17,617.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,718.81 : 28,593.96 = 12,765.69 : x
  2. Step 2: Convert to fraction form
    20,718.81/28,593.96 = 12,765.69/x
  3. Step 3: Cross multiply
    20,718.81x = 28,593.96 × 12,765.69
  4. Step 4: Simplify right side
    20,718.81x = 365,021,629.23
  5. Step 5: Solve for x
    x = 365,021,629.23/20,718.81
  6. Step 6: Final answer
    x = 17,617.89

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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.