Home / 30,724.65-42,396.26-19,389.87

Finding the Fourth Proportional to 30,724.65, 42,396.26 and 19,389.87

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Solution

The fourth proportional to 30,724.65, 42,396.26 and 19,389.87 is: 26,755.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,724.65 : 42,396.26 = 19,389.87 : x
  2. Step 2: Convert to fraction form
    30,724.65/42,396.26 = 19,389.87/x
  3. Step 3: Cross multiply
    30,724.65x = 42,396.26 × 19,389.87
  4. Step 4: Simplify right side
    30,724.65x = 822,057,872.94
  5. Step 5: Solve for x
    x = 822,057,872.94/30,724.65
  6. Step 6: Final answer
    x = 26,755.65

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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.