Home / 12,985.86-19,344.75-12,179.10

Finding the Fourth Proportional to 12,985.86, 19,344.75 and 12,179.10

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Solution

The fourth proportional to 12,985.86, 19,344.75 and 12,179.10 is: 18,142.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,985.86 : 19,344.75 = 12,179.10 : x
  2. Step 2: Convert to fraction form
    12,985.86/19,344.75 = 12,179.10/x
  3. Step 3: Cross multiply
    12,985.86x = 19,344.75 × 12,179.10
  4. Step 4: Simplify right side
    12,985.86x = 235,601,644.73
  5. Step 5: Solve for x
    x = 235,601,644.73/12,985.86
  6. Step 6: Final answer
    x = 18,142.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.