Home / 20,129.48-27,777.84-11,176.45

Finding the Fourth Proportional to 20,129.48, 27,777.84 and 11,176.45

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Solution

The fourth proportional to 20,129.48, 27,777.84 and 11,176.45 is: 15,423.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,129.48 : 27,777.84 = 11,176.45 : x
  2. Step 2: Convert to fraction form
    20,129.48/27,777.84 = 11,176.45/x
  3. Step 3: Cross multiply
    20,129.48x = 27,777.84 × 11,176.45
  4. Step 4: Simplify right side
    20,129.48x = 310,457,570.42
  5. Step 5: Solve for x
    x = 310,457,570.42/20,129.48
  6. Step 6: Final answer
    x = 15,423.03

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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.