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Finding the Fourth Proportional to 13,888.16, 20,832.28 and 3,358.16

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Solution

The fourth proportional to 13,888.16, 20,832.28 and 3,358.16 is: 5,037.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,888.16 : 20,832.28 = 3,358.16 : x
  2. Step 2: Convert to fraction form
    13,888.16/20,832.28 = 3,358.16/x
  3. Step 3: Cross multiply
    13,888.16x = 20,832.28 × 3,358.16
  4. Step 4: Simplify right side
    13,888.16x = 69,958,129.40
  5. Step 5: Solve for x
    x = 69,958,129.40/13,888.16
  6. Step 6: Final answer
    x = 5,037.25

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.