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Finding the Fourth Proportional to 17,806.21, 26,718.59 and 12,916.21

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Solution

The fourth proportional to 17,806.21, 26,718.59 and 12,916.21 is: 19,381.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,806.21 : 26,718.59 = 12,916.21 : x
  2. Step 2: Convert to fraction form
    17,806.21/26,718.59 = 12,916.21/x
  3. Step 3: Cross multiply
    17,806.21x = 26,718.59 × 12,916.21
  4. Step 4: Simplify right side
    17,806.21x = 345,102,919.34
  5. Step 5: Solve for x
    x = 345,102,919.34/17,806.21
  6. Step 6: Final answer
    x = 19,381.04

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.