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Finding the Fourth Proportional to 29,491.20, 40,628.64 and 20,523.30

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Solution

The fourth proportional to 29,491.20, 40,628.64 and 20,523.30 is: 28,273.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,491.20 : 40,628.64 = 20,523.30 : x
  2. Step 2: Convert to fraction form
    29,491.20/40,628.64 = 20,523.30/x
  3. Step 3: Cross multiply
    29,491.20x = 40,628.64 × 20,523.30
  4. Step 4: Simplify right side
    29,491.20x = 833,833,767.31
  5. Step 5: Solve for x
    x = 833,833,767.31/29,491.20
  6. Step 6: Final answer
    x = 28,273.99

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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.