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Finding the Fourth Proportional to 34,407.60, 51,664.20 and 18,855.60

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Solution

The fourth proportional to 34,407.60, 51,664.20 and 18,855.60 is: 28,312.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    34,407.60 : 51,664.20 = 18,855.60 : x
  2. Step 2: Convert to fraction form
    34,407.60/51,664.20 = 18,855.60/x
  3. Step 3: Cross multiply
    34,407.60x = 51,664.20 × 18,855.60
  4. Step 4: Simplify right side
    34,407.60x = 974,159,489.52
  5. Step 5: Solve for x
    x = 974,159,489.52/34,407.60
  6. Step 6: Final answer
    x = 28,312.33

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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.