Home / 20,647.08-28,493.01-11,215.62

Finding the Fourth Proportional to 20,647.08, 28,493.01 and 11,215.62

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Solution

The fourth proportional to 20,647.08, 28,493.01 and 11,215.62 is: 15,477.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,647.08 : 28,493.01 = 11,215.62 : x
  2. Step 2: Convert to fraction form
    20,647.08/28,493.01 = 11,215.62/x
  3. Step 3: Cross multiply
    20,647.08x = 28,493.01 × 11,215.62
  4. Step 4: Simplify right side
    20,647.08x = 319,566,772.82
  5. Step 5: Solve for x
    x = 319,566,772.82/20,647.08
  6. Step 6: Final answer
    x = 15,477.58

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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.