Home / 20,490.33-28,281.24-13,412.64

Finding the Fourth Proportional to 20,490.33, 28,281.24 and 13,412.64

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Solution

The fourth proportional to 20,490.33, 28,281.24 and 13,412.64 is: 18,512.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,490.33 : 28,281.24 = 13,412.64 : x
  2. Step 2: Convert to fraction form
    20,490.33/28,281.24 = 13,412.64/x
  3. Step 3: Cross multiply
    20,490.33x = 28,281.24 × 13,412.64
  4. Step 4: Simplify right side
    20,490.33x = 379,326,090.87
  5. Step 5: Solve for x
    x = 379,326,090.87/20,490.33
  6. Step 6: Final answer
    x = 18,512.44

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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.