Home / 18,319.87-25,299.84-15,787.81

Finding the Fourth Proportional to 18,319.87, 25,299.84 and 15,787.81

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Solution

The fourth proportional to 18,319.87, 25,299.84 and 15,787.81 is: 21,803.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,319.87 : 25,299.84 = 15,787.81 : x
  2. Step 2: Convert to fraction form
    18,319.87/25,299.84 = 15,787.81/x
  3. Step 3: Cross multiply
    18,319.87x = 25,299.84 × 15,787.81
  4. Step 4: Simplify right side
    18,319.87x = 399,429,157.78
  5. Step 5: Solve for x
    x = 399,429,157.78/18,319.87
  6. Step 6: Final answer
    x = 21,803.05

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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.