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Finding the Fourth Proportional to 13,368.62, 18,448.48 and 7,400.16

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Solution

The fourth proportional to 13,368.62, 18,448.48 and 7,400.16 is: 10,212.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,368.62 : 18,448.48 = 7,400.16 : x
  2. Step 2: Convert to fraction form
    13,368.62/18,448.48 = 7,400.16/x
  3. Step 3: Cross multiply
    13,368.62x = 18,448.48 × 7,400.16
  4. Step 4: Simplify right side
    13,368.62x = 136,521,713.01
  5. Step 5: Solve for x
    x = 136,521,713.01/13,368.62
  6. Step 6: Final answer
    x = 10,212.10

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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.