Home / 20,292.80-28,004.65-11,340.32

Finding the Fourth Proportional to 20,292.80, 28,004.65 and 11,340.32

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Solution

The fourth proportional to 20,292.80, 28,004.65 and 11,340.32 is: 15,649.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,292.80 : 28,004.65 = 11,340.32 : x
  2. Step 2: Convert to fraction form
    20,292.80/28,004.65 = 11,340.32/x
  3. Step 3: Cross multiply
    20,292.80x = 28,004.65 × 11,340.32
  4. Step 4: Simplify right side
    20,292.80x = 317,581,627.28
  5. Step 5: Solve for x
    x = 317,581,627.28/20,292.80
  6. Step 6: Final answer
    x = 15,649.97

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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.