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Finding the Fourth Proportional to 13,168, 19,679.36 and 10,558.72

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Solution

The fourth proportional to 13,168, 19,679.36 and 10,558.72 is: 15,779.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,168 : 19,679.36 = 10,558.72 : x
  2. Step 2: Convert to fraction form
    13,168/19,679.36 = 10,558.72/x
  3. Step 3: Cross multiply
    13,168x = 19,679.36 × 10,558.72
  4. Step 4: Simplify right side
    13,168x = 207,788,852.02
  5. Step 5: Solve for x
    x = 207,788,852.02/13,168
  6. Step 6: Final answer
    x = 15,779.83

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.