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Finding the Fourth Proportional to 18,129.28, 27,179.28 and 7,030.24

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Solution

The fourth proportional to 18,129.28, 27,179.28 and 7,030.24 is: 10,539.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,129.28 : 27,179.28 = 7,030.24 : x
  2. Step 2: Convert to fraction form
    18,129.28/27,179.28 = 7,030.24/x
  3. Step 3: Cross multiply
    18,129.28x = 27,179.28 × 7,030.24
  4. Step 4: Simplify right side
    18,129.28x = 191,076,861.43
  5. Step 5: Solve for x
    x = 191,076,861.43/18,129.28
  6. Step 6: Final answer
    x = 10,539.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.