Home / 38,128.09-52,615.90-21,132.07

Finding the Fourth Proportional to 38,128.09, 52,615.90 and 21,132.07

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Solution

The fourth proportional to 38,128.09, 52,615.90 and 21,132.07 is: 29,161.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,128.09 : 52,615.90 = 21,132.07 : x
  2. Step 2: Convert to fraction form
    38,128.09/52,615.90 = 21,132.07/x
  3. Step 3: Cross multiply
    38,128.09x = 52,615.90 × 21,132.07
  4. Step 4: Simplify right side
    38,128.09x = 1,111,882,881.91
  5. Step 5: Solve for x
    x = 1,111,882,881.91/38,128.09
  6. Step 6: Final answer
    x = 29,161.78

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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.