Home / 20,972.30-31,458.29-9,872.94

Finding the Fourth Proportional to 20,972.30, 31,458.29 and 9,872.94

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Solution

The fourth proportional to 20,972.30, 31,458.29 and 9,872.94 is: 14,809.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,972.30 : 31,458.29 = 9,872.94 : x
  2. Step 2: Convert to fraction form
    20,972.30/31,458.29 = 9,872.94/x
  3. Step 3: Cross multiply
    20,972.30x = 31,458.29 × 9,872.94
  4. Step 4: Simplify right side
    20,972.30x = 310,585,715.21
  5. Step 5: Solve for x
    x = 310,585,715.21/20,972.30
  6. Step 6: Final answer
    x = 14,809.33

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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.