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Finding the Fourth Proportional to 19,138.78, 26,411.57 and 10,640.67

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Solution

The fourth proportional to 19,138.78, 26,411.57 and 10,640.67 is: 14,684.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,138.78 : 26,411.57 = 10,640.67 : x
  2. Step 2: Convert to fraction form
    19,138.78/26,411.57 = 10,640.67/x
  3. Step 3: Cross multiply
    19,138.78x = 26,411.57 × 10,640.67
  4. Step 4: Simplify right side
    19,138.78x = 281,036,688.21
  5. Step 5: Solve for x
    x = 281,036,688.21/19,138.78
  6. Step 6: Final answer
    x = 14,684.15

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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.