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Finding the Fourth Proportional to 18,438.84, 25,425.48 and 12,460.14

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Solution

The fourth proportional to 18,438.84, 25,425.48 and 12,460.14 is: 17,181.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,438.84 : 25,425.48 = 12,460.14 : x
  2. Step 2: Convert to fraction form
    18,438.84/25,425.48 = 12,460.14/x
  3. Step 3: Cross multiply
    18,438.84x = 25,425.48 × 12,460.14
  4. Step 4: Simplify right side
    18,438.84x = 316,805,040.37
  5. Step 5: Solve for x
    x = 316,805,040.37/18,438.84
  6. Step 6: Final answer
    x = 17,181.40

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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.