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Finding the Fourth Proportional to 28,956.80, 43,428 and 12,308.24

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Solution

The fourth proportional to 28,956.80, 43,428 and 12,308.24 is: 18,459.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,956.80 : 43,428 = 12,308.24 : x
  2. Step 2: Convert to fraction form
    28,956.80/43,428 = 12,308.24/x
  3. Step 3: Cross multiply
    28,956.80x = 43,428 × 12,308.24
  4. Step 4: Simplify right side
    28,956.80x = 534,522,246.72
  5. Step 5: Solve for x
    x = 534,522,246.72/28,956.80
  6. Step 6: Final answer
    x = 18,459.30

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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.