Home / 20,670.32-28,525.36-11,238.92

Finding the Fourth Proportional to 20,670.32, 28,525.36 and 11,238.92

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Solution

The fourth proportional to 20,670.32, 28,525.36 and 11,238.92 is: 15,509.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,670.32 : 28,525.36 = 11,238.92 : x
  2. Step 2: Convert to fraction form
    20,670.32/28,525.36 = 11,238.92/x
  3. Step 3: Cross multiply
    20,670.32x = 28,525.36 × 11,238.92
  4. Step 4: Simplify right side
    20,670.32x = 320,594,239.01
  5. Step 5: Solve for x
    x = 320,594,239.01/20,670.32
  6. Step 6: Final answer
    x = 15,509.88

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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.