Home / 38,120.96-52,610.10-21,129.32

Finding the Fourth Proportional to 38,120.96, 52,610.10 and 21,129.32

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Solution

The fourth proportional to 38,120.96, 52,610.10 and 21,129.32 is: 29,160.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,120.96 : 52,610.10 = 21,129.32 : x
  2. Step 2: Convert to fraction form
    38,120.96/52,610.10 = 21,129.32/x
  3. Step 3: Cross multiply
    38,120.96x = 52,610.10 × 21,129.32
  4. Step 4: Simplify right side
    38,120.96x = 1,111,615,638.13
  5. Step 5: Solve for x
    x = 1,111,615,638.13/38,120.96
  6. Step 6: Final answer
    x = 29,160.22

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Half scale
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Double scale
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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.