Home / 20,907.12-31,371.84-9,813.91

Finding the Fourth Proportional to 20,907.12, 31,371.84 and 9,813.91

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Solution

The fourth proportional to 20,907.12, 31,371.84 and 9,813.91 is: 14,726.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,907.12 : 31,371.84 = 9,813.91 : x
  2. Step 2: Convert to fraction form
    20,907.12/31,371.84 = 9,813.91/x
  3. Step 3: Cross multiply
    20,907.12x = 31,371.84 × 9,813.91
  4. Step 4: Simplify right side
    20,907.12x = 307,880,257.44
  5. Step 5: Solve for x
    x = 307,880,257.44/20,907.12
  6. Step 6: Final answer
    x = 14,726.10

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1.5x scale

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.