Home / 20,872.22-31,318.59-9,776.99

Finding the Fourth Proportional to 20,872.22, 31,318.59 and 9,776.99

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Solution

The fourth proportional to 20,872.22, 31,318.59 and 9,776.99 is: 14,670.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,872.22 : 31,318.59 = 9,776.99 : x
  2. Step 2: Convert to fraction form
    20,872.22/31,318.59 = 9,776.99/x
  3. Step 3: Cross multiply
    20,872.22x = 31,318.59 × 9,776.99
  4. Step 4: Simplify right side
    20,872.22x = 306,201,384.65
  5. Step 5: Solve for x
    x = 306,201,384.65/20,872.22
  6. Step 6: Final answer
    x = 14,670.29

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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.