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Finding the Fourth Proportional to 18,181.75, 25,070.12 and 12,802.47

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Solution

The fourth proportional to 18,181.75, 25,070.12 and 12,802.47 is: 17,652.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,181.75 : 25,070.12 = 12,802.47 : x
  2. Step 2: Convert to fraction form
    18,181.75/25,070.12 = 12,802.47/x
  3. Step 3: Cross multiply
    18,181.75x = 25,070.12 × 12,802.47
  4. Step 4: Simplify right side
    18,181.75x = 320,959,459.20
  5. Step 5: Solve for x
    x = 320,959,459.20/18,181.75
  6. Step 6: Final answer
    x = 17,652.84

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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.