Home / 20,507.64-28,300.54-11,076.20

Finding the Fourth Proportional to 20,507.64, 28,300.54 and 11,076.20

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Solution

The fourth proportional to 20,507.64, 28,300.54 and 11,076.20 is: 15,285.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,507.64 : 28,300.54 = 11,076.20 : x
  2. Step 2: Convert to fraction form
    20,507.64/28,300.54 = 11,076.20/x
  3. Step 3: Cross multiply
    20,507.64x = 28,300.54 × 11,076.20
  4. Step 4: Simplify right side
    20,507.64x = 313,462,441.15
  5. Step 5: Solve for x
    x = 313,462,441.15/20,507.64
  6. Step 6: Final answer
    x = 15,285.15

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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.