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Finding the Fourth Proportional to 18,902.62, 26,085.71 and 10,405.60

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Solution

The fourth proportional to 18,902.62, 26,085.71 and 10,405.60 is: 14,359.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,902.62 : 26,085.71 = 10,405.60 : x
  2. Step 2: Convert to fraction form
    18,902.62/26,085.71 = 10,405.60/x
  3. Step 3: Cross multiply
    18,902.62x = 26,085.71 × 10,405.60
  4. Step 4: Simplify right side
    18,902.62x = 271,437,411.77
  5. Step 5: Solve for x
    x = 271,437,411.77/18,902.62
  6. Step 6: Final answer
    x = 14,359.78

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1.5x scale

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.