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Finding the Fourth Proportional to 13,368.81, 18,449.25 and 7,400.89

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Solution

The fourth proportional to 13,368.81, 18,449.25 and 7,400.89 is: 10,213.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,368.81 : 18,449.25 = 7,400.89 : x
  2. Step 2: Convert to fraction form
    13,368.81/18,449.25 = 7,400.89/x
  3. Step 3: Cross multiply
    13,368.81x = 18,449.25 × 7,400.89
  4. Step 4: Simplify right side
    13,368.81x = 136,540,869.83
  5. Step 5: Solve for x
    x = 136,540,869.83/13,368.81
  6. Step 6: Final answer
    x = 10,213.39

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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.