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Finding the Fourth Proportional to 19,671.21, 29,482.92 and 9,126.90

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Solution

The fourth proportional to 19,671.21, 29,482.92 and 9,126.90 is: 13,679.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,671.21 : 29,482.92 = 9,126.90 : x
  2. Step 2: Convert to fraction form
    19,671.21/29,482.92 = 9,126.90/x
  3. Step 3: Cross multiply
    19,671.21x = 29,482.92 × 9,126.90
  4. Step 4: Simplify right side
    19,671.21x = 269,087,662.55
  5. Step 5: Solve for x
    x = 269,087,662.55/19,671.21
  6. Step 6: Final answer
    x = 13,679.26

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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.