Home / 21,946.70-30,286.38-11,875.31

Finding the Fourth Proportional to 21,946.70, 30,286.38 and 11,875.31

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Solution

The fourth proportional to 21,946.70, 30,286.38 and 11,875.31 is: 16,387.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,946.70 : 30,286.38 = 11,875.31 : x
  2. Step 2: Convert to fraction form
    21,946.70/30,286.38 = 11,875.31/x
  3. Step 3: Cross multiply
    21,946.70x = 30,286.38 × 11,875.31
  4. Step 4: Simplify right side
    21,946.70x = 359,660,124.55
  5. Step 5: Solve for x
    x = 359,660,124.55/21,946.70
  6. Step 6: Final answer
    x = 16,387.89

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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.