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Finding the Fourth Proportional to 12,699.28, 19,048.92 and 3,465.28

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Solution

The fourth proportional to 12,699.28, 19,048.92 and 3,465.28 is: 5,197.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,699.28 : 19,048.92 = 3,465.28 : x
  2. Step 2: Convert to fraction form
    12,699.28/19,048.92 = 3,465.28/x
  3. Step 3: Cross multiply
    12,699.28x = 19,048.92 × 3,465.28
  4. Step 4: Simplify right side
    12,699.28x = 66,009,871.81
  5. Step 5: Solve for x
    x = 66,009,871.81/12,699.28
  6. Step 6: Final answer
    x = 5,197.92

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Similar ratio
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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.