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Finding the Fourth Proportional to 17,645.40, 26,489.70 and 17,515.80

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Solution

The fourth proportional to 17,645.40, 26,489.70 and 17,515.80 is: 26,295.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,645.40 : 26,489.70 = 17,515.80 : x
  2. Step 2: Convert to fraction form
    17,645.40/26,489.70 = 17,515.80/x
  3. Step 3: Cross multiply
    17,645.40x = 26,489.70 × 17,515.80
  4. Step 4: Simplify right side
    17,645.40x = 463,988,287.26
  5. Step 5: Solve for x
    x = 463,988,287.26/17,645.40
  6. Step 6: Final answer
    x = 26,295.14

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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.