Home / 21,530.76-29,714.90-13,572.51

Finding the Fourth Proportional to 21,530.76, 29,714.90 and 13,572.51

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Solution

The fourth proportional to 21,530.76, 29,714.90 and 13,572.51 is: 18,731.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,530.76 : 29,714.90 = 13,572.51 : x
  2. Step 2: Convert to fraction form
    21,530.76/29,714.90 = 13,572.51/x
  3. Step 3: Cross multiply
    21,530.76x = 29,714.90 × 13,572.51
  4. Step 4: Simplify right side
    21,530.76x = 403,305,709.54
  5. Step 5: Solve for x
    x = 403,305,709.54/21,530.76
  6. Step 6: Final answer
    x = 18,731.61

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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.