Home / 21,818.26-30,108.81-12,386.62

Finding the Fourth Proportional to 21,818.26, 30,108.81 and 12,386.62

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Solution

The fourth proportional to 21,818.26, 30,108.81 and 12,386.62 is: 17,093.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,818.26 : 30,108.81 = 12,386.62 : x
  2. Step 2: Convert to fraction form
    21,818.26/30,108.81 = 12,386.62/x
  3. Step 3: Cross multiply
    21,818.26x = 30,108.81 × 12,386.62
  4. Step 4: Simplify right side
    21,818.26x = 372,946,388.12
  5. Step 5: Solve for x
    x = 372,946,388.12/21,818.26
  6. Step 6: Final answer
    x = 17,093.31

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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.