Home / 22,379.04-30,881.40-12,945.78

Finding the Fourth Proportional to 22,379.04, 30,881.40 and 12,945.78

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Solution

The fourth proportional to 22,379.04, 30,881.40 and 12,945.78 is: 17,864.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,379.04 : 30,881.40 = 12,945.78 : x
  2. Step 2: Convert to fraction form
    22,379.04/30,881.40 = 12,945.78/x
  3. Step 3: Cross multiply
    22,379.04x = 30,881.40 × 12,945.78
  4. Step 4: Simplify right side
    22,379.04x = 399,783,810.49
  5. Step 5: Solve for x
    x = 399,783,810.49/22,379.04
  6. Step 6: Final answer
    x = 17,864.21

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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.