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Finding the Fourth Proportional to 13,622.88, 20,434.80 and 3,762.88

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Solution

The fourth proportional to 13,622.88, 20,434.80 and 3,762.88 is: 5,644.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,622.88 : 20,434.80 = 3,762.88 : x
  2. Step 2: Convert to fraction form
    13,622.88/20,434.80 = 3,762.88/x
  3. Step 3: Cross multiply
    13,622.88x = 20,434.80 × 3,762.88
  4. Step 4: Simplify right side
    13,622.88x = 76,893,700.22
  5. Step 5: Solve for x
    x = 76,893,700.22/13,622.88
  6. Step 6: Final answer
    x = 5,644.45

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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.