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Finding the Fourth Proportional to 17,117.60, 25,676.40 and 13,618.40

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Solution

The fourth proportional to 17,117.60, 25,676.40 and 13,618.40 is: 20,427.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,117.60 : 25,676.40 = 13,618.40 : x
  2. Step 2: Convert to fraction form
    17,117.60/25,676.40 = 13,618.40/x
  3. Step 3: Cross multiply
    17,117.60x = 25,676.40 × 13,618.40
  4. Step 4: Simplify right side
    17,117.60x = 349,671,485.76
  5. Step 5: Solve for x
    x = 349,671,485.76/17,117.60
  6. Step 6: Final answer
    x = 20,427.60

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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.