Home / 12,991.42-19,354.23-12,364.48

Finding the Fourth Proportional to 12,991.42, 19,354.23 and 12,364.48

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Solution

The fourth proportional to 12,991.42, 19,354.23 and 12,364.48 is: 18,420.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,991.42 : 19,354.23 = 12,364.48 : x
  2. Step 2: Convert to fraction form
    12,991.42/19,354.23 = 12,364.48/x
  3. Step 3: Cross multiply
    12,991.42x = 19,354.23 × 12,364.48
  4. Step 4: Simplify right side
    12,991.42x = 239,304,989.75
  5. Step 5: Solve for x
    x = 239,304,989.75/12,991.42
  6. Step 6: Final answer
    x = 18,420.23

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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.