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Finding the Fourth Proportional to 18,634.61, 25,710.66 and 12,962.99

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Solution

The fourth proportional to 18,634.61, 25,710.66 and 12,962.99 is: 17,885.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,634.61 : 25,710.66 = 12,962.99 : x
  2. Step 2: Convert to fraction form
    18,634.61/25,710.66 = 12,962.99/x
  3. Step 3: Cross multiply
    18,634.61x = 25,710.66 × 12,962.99
  4. Step 4: Simplify right side
    18,634.61x = 333,286,899.92
  5. Step 5: Solve for x
    x = 333,286,899.92/18,634.61
  6. Step 6: Final answer
    x = 17,885.38

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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.