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Finding the Fourth Proportional to 17,210.40, 25,820.40 and 8,445.60

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Solution

The fourth proportional to 17,210.40, 25,820.40 and 8,445.60 is: 12,670.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,210.40 : 25,820.40 = 8,445.60 : x
  2. Step 2: Convert to fraction form
    17,210.40/25,820.40 = 8,445.60/x
  3. Step 3: Cross multiply
    17,210.40x = 25,820.40 × 8,445.60
  4. Step 4: Simplify right side
    17,210.40x = 218,068,770.24
  5. Step 5: Solve for x
    x = 218,068,770.24/17,210.40
  6. Step 6: Final answer
    x = 12,670.76

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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.