Home / 38,712.97-53,424.43-21,720.89

Finding the Fourth Proportional to 38,712.97, 53,424.43 and 21,720.89

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Solution

The fourth proportional to 38,712.97, 53,424.43 and 21,720.89 is: 29,975.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,712.97 : 53,424.43 = 21,720.89 : x
  2. Step 2: Convert to fraction form
    38,712.97/53,424.43 = 21,720.89/x
  3. Step 3: Cross multiply
    38,712.97x = 53,424.43 × 21,720.89
  4. Step 4: Simplify right side
    38,712.97x = 1,160,426,246.60
  5. Step 5: Solve for x
    x = 1,160,426,246.60/38,712.97
  6. Step 6: Final answer
    x = 29,975.13

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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.