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Finding the Fourth Proportional to 43,655.64, 65,454.30 and 13,659.72

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Solution

The fourth proportional to 43,655.64, 65,454.30 and 13,659.72 is: 20,480.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,655.64 : 65,454.30 = 13,659.72 : x
  2. Step 2: Convert to fraction form
    43,655.64/65,454.30 = 13,659.72/x
  3. Step 3: Cross multiply
    43,655.64x = 65,454.30 × 13,659.72
  4. Step 4: Simplify right side
    43,655.64x = 894,087,410.80
  5. Step 5: Solve for x
    x = 894,087,410.80/43,655.64
  6. Step 6: Final answer
    x = 20,480.46

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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.