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Finding the Fourth Proportional to 12,950.98, 19,400.75 and 9,979.12

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Solution

The fourth proportional to 12,950.98, 19,400.75 and 9,979.12 is: 14,948.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,950.98 : 19,400.75 = 9,979.12 : x
  2. Step 2: Convert to fraction form
    12,950.98/19,400.75 = 9,979.12/x
  3. Step 3: Cross multiply
    12,950.98x = 19,400.75 × 9,979.12
  4. Step 4: Simplify right side
    12,950.98x = 193,602,371.12
  5. Step 5: Solve for x
    x = 193,602,371.12/12,950.98
  6. Step 6: Final answer
    x = 14,948.86

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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.