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Finding the Fourth Proportional to 13,368.88, 18,449.36 and 7,400.80

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Solution

The fourth proportional to 13,368.88, 18,449.36 and 7,400.80 is: 10,213.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,368.88 : 18,449.36 = 7,400.80 : x
  2. Step 2: Convert to fraction form
    13,368.88/18,449.36 = 7,400.80/x
  3. Step 3: Cross multiply
    13,368.88x = 18,449.36 × 7,400.80
  4. Step 4: Simplify right side
    13,368.88x = 136,540,023.49
  5. Step 5: Solve for x
    x = 136,540,023.49/13,368.88
  6. Step 6: Final answer
    x = 10,213.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.