Home / 20,663.28-28,514.16-11,712.96

Finding the Fourth Proportional to 20,663.28, 28,514.16 and 11,712.96

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Solution

The fourth proportional to 20,663.28, 28,514.16 and 11,712.96 is: 16,163.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,663.28 : 28,514.16 = 11,712.96 : x
  2. Step 2: Convert to fraction form
    20,663.28/28,514.16 = 11,712.96/x
  3. Step 3: Cross multiply
    20,663.28x = 28,514.16 × 11,712.96
  4. Step 4: Simplify right side
    20,663.28x = 333,985,215.51
  5. Step 5: Solve for x
    x = 333,985,215.51/20,663.28
  6. Step 6: Final answer
    x = 16,163.22

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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.