Home / 20,972.28-31,450.86-7,118.04

Finding the Fourth Proportional to 20,972.28, 31,450.86 and 7,118.04

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Solution

The fourth proportional to 20,972.28, 31,450.86 and 7,118.04 is: 10,674.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,972.28 : 31,450.86 = 7,118.04 : x
  2. Step 2: Convert to fraction form
    20,972.28/31,450.86 = 7,118.04/x
  3. Step 3: Cross multiply
    20,972.28x = 31,450.86 × 7,118.04
  4. Step 4: Simplify right side
    20,972.28x = 223,868,479.51
  5. Step 5: Solve for x
    x = 223,868,479.51/20,972.28
  6. Step 6: Final answer
    x = 10,674.49

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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.