Home / 38,971.58-53,787.78-21,981.02

Finding the Fourth Proportional to 38,971.58, 53,787.78 and 21,981.02

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Solution

The fourth proportional to 38,971.58, 53,787.78 and 21,981.02 is: 30,337.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,971.58 : 53,787.78 = 21,981.02 : x
  2. Step 2: Convert to fraction form
    38,971.58/53,787.78 = 21,981.02/x
  3. Step 3: Cross multiply
    38,971.58x = 53,787.78 × 21,981.02
  4. Step 4: Simplify right side
    38,971.58x = 1,182,310,267.94
  5. Step 5: Solve for x
    x = 1,182,310,267.94/38,971.58
  6. Step 6: Final answer
    x = 30,337.76

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Similar ratio
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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.