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Finding the Fourth Proportional to 18,314.88, 25,274.53 and 9,931.38

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Solution

The fourth proportional to 18,314.88, 25,274.53 and 9,931.38 is: 13,705.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,314.88 : 25,274.53 = 9,931.38 : x
  2. Step 2: Convert to fraction form
    18,314.88/25,274.53 = 9,931.38/x
  3. Step 3: Cross multiply
    18,314.88x = 25,274.53 × 9,931.38
  4. Step 4: Simplify right side
    18,314.88x = 251,010,879.39
  5. Step 5: Solve for x
    x = 251,010,879.39/18,314.88
  6. Step 6: Final answer
    x = 13,705.30

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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.