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Finding the Fourth Proportional to 13,671.90, 20,512.65 and 4,907.10

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Solution

The fourth proportional to 13,671.90, 20,512.65 and 4,907.10 is: 7,362.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,671.90 : 20,512.65 = 4,907.10 : x
  2. Step 2: Convert to fraction form
    13,671.90/20,512.65 = 4,907.10/x
  3. Step 3: Cross multiply
    13,671.90x = 20,512.65 × 4,907.10
  4. Step 4: Simplify right side
    13,671.90x = 100,657,624.82
  5. Step 5: Solve for x
    x = 100,657,624.82/13,671.90
  6. Step 6: Final answer
    x = 7,362.37

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1.5x scale

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.