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Finding the Fourth Proportional to 18,965.16, 26,152.50 and 12,589.50

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Solution

The fourth proportional to 18,965.16, 26,152.50 and 12,589.50 is: 17,360.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,965.16 : 26,152.50 = 12,589.50 : x
  2. Step 2: Convert to fraction form
    18,965.16/26,152.50 = 12,589.50/x
  3. Step 3: Cross multiply
    18,965.16x = 26,152.50 × 12,589.50
  4. Step 4: Simplify right side
    18,965.16x = 329,246,898.75
  5. Step 5: Solve for x
    x = 329,246,898.75/18,965.16
  6. Step 6: Final answer
    x = 17,360.62

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.