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Finding the Fourth Proportional to 13,368.80, 18,448.16 and 7,400.12

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Solution

The fourth proportional to 13,368.80, 18,448.16 and 7,400.12 is: 10,211.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,368.80 : 18,448.16 = 7,400.12 : x
  2. Step 2: Convert to fraction form
    13,368.80/18,448.16 = 7,400.12/x
  3. Step 3: Cross multiply
    13,368.80x = 18,448.16 × 7,400.12
  4. Step 4: Simplify right side
    13,368.80x = 136,518,468.54
  5. Step 5: Solve for x
    x = 136,518,468.54/13,368.80
  6. Step 6: Final answer
    x = 10,211.72

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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.