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Finding the Fourth Proportional to 13,925, 20,887.50 and 4,691

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Solution

The fourth proportional to 13,925, 20,887.50 and 4,691 is: 7,036.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,925 : 20,887.50 = 4,691 : x
  2. Step 2: Convert to fraction form
    13,925/20,887.50 = 4,691/x
  3. Step 3: Cross multiply
    13,925x = 20,887.50 × 4,691
  4. Step 4: Simplify right side
    13,925x = 97,983,262.50
  5. Step 5: Solve for x
    x = 97,983,262.50/13,925
  6. Step 6: Final answer
    x = 7,036.50

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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.