Home / 20,921.44-31,342.58-16,218.40

Finding the Fourth Proportional to 20,921.44, 31,342.58 and 16,218.40

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Solution

The fourth proportional to 20,921.44, 31,342.58 and 16,218.40 is: 24,296.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,921.44 : 31,342.58 = 16,218.40 : x
  2. Step 2: Convert to fraction form
    20,921.44/31,342.58 = 16,218.40/x
  3. Step 3: Cross multiply
    20,921.44x = 31,342.58 × 16,218.40
  4. Step 4: Simplify right side
    20,921.44x = 508,326,616.18
  5. Step 5: Solve for x
    x = 508,326,616.18/20,921.44
  6. Step 6: Final answer
    x = 24,296.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.