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Finding the Fourth Proportional to 12,953.36, 19,430.16 and 3,719.36

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Solution

The fourth proportional to 12,953.36, 19,430.16 and 3,719.36 is: 5,579.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,953.36 : 19,430.16 = 3,719.36 : x
  2. Step 2: Convert to fraction form
    12,953.36/19,430.16 = 3,719.36/x
  3. Step 3: Cross multiply
    12,953.36x = 19,430.16 × 3,719.36
  4. Step 4: Simplify right side
    12,953.36x = 72,267,759.90
  5. Step 5: Solve for x
    x = 72,267,759.90/12,953.36
  6. Step 6: Final answer
    x = 5,579.07

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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.