Home / 20,420.36-28,179.08-11,468.24

Finding the Fourth Proportional to 20,420.36, 28,179.08 and 11,468.24

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Solution

The fourth proportional to 20,420.36, 28,179.08 and 11,468.24 is: 15,825.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,420.36 : 28,179.08 = 11,468.24 : x
  2. Step 2: Convert to fraction form
    20,420.36/28,179.08 = 11,468.24/x
  3. Step 3: Cross multiply
    20,420.36x = 28,179.08 × 11,468.24
  4. Step 4: Simplify right side
    20,420.36x = 323,164,254.18
  5. Step 5: Solve for x
    x = 323,164,254.18/20,420.36
  6. Step 6: Final answer
    x = 15,825.59

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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.