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Finding the Fourth Proportional to 18,670.88, 25,765.89 and 10,287.38

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Solution

The fourth proportional to 18,670.88, 25,765.89 and 10,287.38 is: 14,196.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,670.88 : 25,765.89 = 10,287.38 : x
  2. Step 2: Convert to fraction form
    18,670.88/25,765.89 = 10,287.38/x
  3. Step 3: Cross multiply
    18,670.88x = 25,765.89 × 10,287.38
  4. Step 4: Simplify right side
    18,670.88x = 265,063,501.47
  5. Step 5: Solve for x
    x = 265,063,501.47/18,670.88
  6. Step 6: Final answer
    x = 14,196.63

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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.