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Finding the Fourth Proportional to 12,651, 18,939.12 and 9,342.12

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Solution

The fourth proportional to 12,651, 18,939.12 and 9,342.12 is: 13,985.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,651 : 18,939.12 = 9,342.12 : x
  2. Step 2: Convert to fraction form
    12,651/18,939.12 = 9,342.12/x
  3. Step 3: Cross multiply
    12,651x = 18,939.12 × 9,342.12
  4. Step 4: Simplify right side
    12,651x = 176,931,531.73
  5. Step 5: Solve for x
    x = 176,931,531.73/12,651
  6. Step 6: Final answer
    x = 13,985.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.