Home / 38,787.87-53,523.98-21,790.78

Finding the Fourth Proportional to 38,787.87, 53,523.98 and 21,790.78

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Solution

The fourth proportional to 38,787.87, 53,523.98 and 21,790.78 is: 30,069.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,787.87 : 53,523.98 = 21,790.78 : x
  2. Step 2: Convert to fraction form
    38,787.87/53,523.98 = 21,790.78/x
  3. Step 3: Cross multiply
    38,787.87x = 53,523.98 × 21,790.78
  4. Step 4: Simplify right side
    38,787.87x = 1,166,329,406.71
  5. Step 5: Solve for x
    x = 1,166,329,406.71/38,787.87
  6. Step 6: Final answer
    x = 30,069.43

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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.