Home / 20,455.91-28,216.89-12,484.29

Finding the Fourth Proportional to 20,455.91, 28,216.89 and 12,484.29

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Solution

The fourth proportional to 20,455.91, 28,216.89 and 12,484.29 is: 17,220.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,455.91 : 28,216.89 = 12,484.29 : x
  2. Step 2: Convert to fraction form
    20,455.91/28,216.89 = 12,484.29/x
  3. Step 3: Cross multiply
    20,455.91x = 28,216.89 × 12,484.29
  4. Step 4: Simplify right side
    20,455.91x = 352,267,837.66
  5. Step 5: Solve for x
    x = 352,267,837.66/20,455.91
  6. Step 6: Final answer
    x = 17,220.84

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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.