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Finding the Fourth Proportional to 13,235.76, 18,134.64 and 13,071.78

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Solution

The fourth proportional to 13,235.76, 18,134.64 and 13,071.78 is: 17,909.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,235.76 : 18,134.64 = 13,071.78 : x
  2. Step 2: Convert to fraction form
    13,235.76/18,134.64 = 13,071.78/x
  3. Step 3: Cross multiply
    13,235.76x = 18,134.64 × 13,071.78
  4. Step 4: Simplify right side
    13,235.76x = 237,052,024.46
  5. Step 5: Solve for x
    x = 237,052,024.46/13,235.76
  6. Step 6: Final answer
    x = 17,909.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.