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Finding the Fourth Proportional to 13,368.65, 18,448.90 and 7,400.87

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Solution

The fourth proportional to 13,368.65, 18,448.90 and 7,400.87 is: 10,213.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,368.65 : 18,448.90 = 7,400.87 : x
  2. Step 2: Convert to fraction form
    13,368.65/18,448.90 = 7,400.87/x
  3. Step 3: Cross multiply
    13,368.65x = 18,448.90 × 7,400.87
  4. Step 4: Simplify right side
    13,368.65x = 136,537,910.54
  5. Step 5: Solve for x
    x = 136,537,910.54/13,368.65
  6. Step 6: Final answer
    x = 10,213.29

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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.