Home / 21,818.48-30,106.22-13,318.34

Finding the Fourth Proportional to 21,818.48, 30,106.22 and 13,318.34

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Solution

The fourth proportional to 21,818.48, 30,106.22 and 13,318.34 is: 18,377.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,818.48 : 30,106.22 = 13,318.34 : x
  2. Step 2: Convert to fraction form
    21,818.48/30,106.22 = 13,318.34/x
  3. Step 3: Cross multiply
    21,818.48x = 30,106.22 × 13,318.34
  4. Step 4: Simplify right side
    21,818.48x = 400,964,656.95
  5. Step 5: Solve for x
    x = 400,964,656.95/21,818.48
  6. Step 6: Final answer
    x = 18,377.30

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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.