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Finding the Fourth Proportional to 13,602.72, 20,402.64 and 4,368

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Solution

The fourth proportional to 13,602.72, 20,402.64 and 4,368 is: 6,551.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,602.72 : 20,402.64 = 4,368 : x
  2. Step 2: Convert to fraction form
    13,602.72/20,402.64 = 4,368/x
  3. Step 3: Cross multiply
    13,602.72x = 20,402.64 × 4,368
  4. Step 4: Simplify right side
    13,602.72x = 89,118,731.52
  5. Step 5: Solve for x
    x = 89,118,731.52/13,602.72
  6. Step 6: Final answer
    x = 6,551.54

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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.