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Finding the Fourth Proportional to 14,129.40, 21,218.40 and 9,220.80

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Solution

The fourth proportional to 14,129.40, 21,218.40 and 9,220.80 is: 13,847.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,129.40 : 21,218.40 = 9,220.80 : x
  2. Step 2: Convert to fraction form
    14,129.40/21,218.40 = 9,220.80/x
  3. Step 3: Cross multiply
    14,129.40x = 21,218.40 × 9,220.80
  4. Step 4: Simplify right side
    14,129.40x = 195,650,622.72
  5. Step 5: Solve for x
    x = 195,650,622.72/14,129.40
  6. Step 6: Final answer
    x = 13,847.06

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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.