Home / 20,914.80-31,362.12-12,152.24

Finding the Fourth Proportional to 20,914.80, 31,362.12 and 12,152.24

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Solution

The fourth proportional to 20,914.80, 31,362.12 and 12,152.24 is: 18,222.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,914.80 : 31,362.12 = 12,152.24 : x
  2. Step 2: Convert to fraction form
    20,914.80/31,362.12 = 12,152.24/x
  3. Step 3: Cross multiply
    20,914.80x = 31,362.12 × 12,152.24
  4. Step 4: Simplify right side
    20,914.80x = 381,120,009.15
  5. Step 5: Solve for x
    x = 381,120,009.15/20,914.80
  6. Step 6: Final answer
    x = 18,222.50

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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.