Home / 20,640.24-28,483.72-11,208.88

Finding the Fourth Proportional to 20,640.24, 28,483.72 and 11,208.88

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Solution

The fourth proportional to 20,640.24, 28,483.72 and 11,208.88 is: 15,468.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,640.24 : 28,483.72 = 11,208.88 : x
  2. Step 2: Convert to fraction form
    20,640.24/28,483.72 = 11,208.88/x
  3. Step 3: Cross multiply
    20,640.24x = 28,483.72 × 11,208.88
  4. Step 4: Simplify right side
    20,640.24x = 319,270,599.43
  5. Step 5: Solve for x
    x = 319,270,599.43/20,640.24
  6. Step 6: Final answer
    x = 15,468.36

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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.