Home / 20,376.02-28,119.69-11,423.72

Finding the Fourth Proportional to 20,376.02, 28,119.69 and 11,423.72

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Solution

The fourth proportional to 20,376.02, 28,119.69 and 11,423.72 is: 15,765.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,376.02 : 28,119.69 = 11,423.72 : x
  2. Step 2: Convert to fraction form
    20,376.02/28,119.69 = 11,423.72/x
  3. Step 3: Cross multiply
    20,376.02x = 28,119.69 × 11,423.72
  4. Step 4: Simplify right side
    20,376.02x = 321,231,324.45
  5. Step 5: Solve for x
    x = 321,231,324.45/20,376.02
  6. Step 6: Final answer
    x = 15,765.17

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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.