Home / 21,818.24-30,109.60-12,387.44

Finding the Fourth Proportional to 21,818.24, 30,109.60 and 12,387.44

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Solution

The fourth proportional to 21,818.24, 30,109.60 and 12,387.44 is: 17,094.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,818.24 : 30,109.60 = 12,387.44 : x
  2. Step 2: Convert to fraction form
    21,818.24/30,109.60 = 12,387.44/x
  3. Step 3: Cross multiply
    21,818.24x = 30,109.60 × 12,387.44
  4. Step 4: Simplify right side
    21,818.24x = 372,980,863.42
  5. Step 5: Solve for x
    x = 372,980,863.42/21,818.24
  6. Step 6: Final answer
    x = 17,094.91

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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.