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Finding the Fourth Proportional to 29,631.20, 40,820.64 and 20,662.40

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Solution

The fourth proportional to 29,631.20, 40,820.64 and 20,662.40 is: 28,465.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,631.20 : 40,820.64 = 20,662.40 : x
  2. Step 2: Convert to fraction form
    29,631.20/40,820.64 = 20,662.40/x
  3. Step 3: Cross multiply
    29,631.20x = 40,820.64 × 20,662.40
  4. Step 4: Simplify right side
    29,631.20x = 843,452,391.94
  5. Step 5: Solve for x
    x = 843,452,391.94/29,631.20
  6. Step 6: Final answer
    x = 28,465.01

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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.