Home / 20,967.20-31,450.80-7,116.32

Finding the Fourth Proportional to 20,967.20, 31,450.80 and 7,116.32

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Solution

The fourth proportional to 20,967.20, 31,450.80 and 7,116.32 is: 10,674.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,967.20 : 31,450.80 = 7,116.32 : x
  2. Step 2: Convert to fraction form
    20,967.20/31,450.80 = 7,116.32/x
  3. Step 3: Cross multiply
    20,967.20x = 31,450.80 × 7,116.32
  4. Step 4: Simplify right side
    20,967.20x = 223,813,957.06
  5. Step 5: Solve for x
    x = 223,813,957.06/20,967.20
  6. Step 6: Final answer
    x = 10,674.48

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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.