Home / 42,518.99-63,787.64-12,939.21

Finding the Fourth Proportional to 42,518.99, 63,787.64 and 12,939.21

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Solution

The fourth proportional to 42,518.99, 63,787.64 and 12,939.21 is: 19,411.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,518.99 : 63,787.64 = 12,939.21 : x
  2. Step 2: Convert to fraction form
    42,518.99/63,787.64 = 12,939.21/x
  3. Step 3: Cross multiply
    42,518.99x = 63,787.64 × 12,939.21
  4. Step 4: Simplify right side
    42,518.99x = 825,361,604.67
  5. Step 5: Solve for x
    x = 825,361,604.67/42,518.99
  6. Step 6: Final answer
    x = 19,411.60

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.