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Finding the Fourth Proportional to 12,689.26, 17,492.90 and 8,900.69

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Solution

The fourth proportional to 12,689.26, 17,492.90 and 8,900.69 is: 12,270.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,689.26 : 17,492.90 = 8,900.69 : x
  2. Step 2: Convert to fraction form
    12,689.26/17,492.90 = 8,900.69/x
  3. Step 3: Cross multiply
    12,689.26x = 17,492.90 × 8,900.69
  4. Step 4: Simplify right side
    12,689.26x = 155,698,748.13
  5. Step 5: Solve for x
    x = 155,698,748.13/12,689.26
  6. Step 6: Final answer
    x = 12,270.12

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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.