Home / 20,374.64-28,115.10-11,420.24

Finding the Fourth Proportional to 20,374.64, 28,115.10 and 11,420.24

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Solution

The fourth proportional to 20,374.64, 28,115.10 and 11,420.24 is: 15,758.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,374.64 : 28,115.10 = 11,420.24 : x
  2. Step 2: Convert to fraction form
    20,374.64/28,115.10 = 11,420.24/x
  3. Step 3: Cross multiply
    20,374.64x = 28,115.10 × 11,420.24
  4. Step 4: Simplify right side
    20,374.64x = 321,081,207.20
  5. Step 5: Solve for x
    x = 321,081,207.20/20,374.64
  6. Step 6: Final answer
    x = 15,758.87

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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.