Home / 20,647.32-28,493.28-11,215.82

Finding the Fourth Proportional to 20,647.32, 28,493.28 and 11,215.82

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Solution

The fourth proportional to 20,647.32, 28,493.28 and 11,215.82 is: 15,477.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,647.32 : 28,493.28 = 11,215.82 : x
  2. Step 2: Convert to fraction form
    20,647.32/28,493.28 = 11,215.82/x
  3. Step 3: Cross multiply
    20,647.32x = 28,493.28 × 11,215.82
  4. Step 4: Simplify right side
    20,647.32x = 319,575,357.22
  5. Step 5: Solve for x
    x = 319,575,357.22/20,647.32
  6. Step 6: Final answer
    x = 15,477.81

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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.