Home / 20,723.01-31,084.35-12,405.34

Finding the Fourth Proportional to 20,723.01, 31,084.35 and 12,405.34

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Solution

The fourth proportional to 20,723.01, 31,084.35 and 12,405.34 is: 18,607.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,723.01 : 31,084.35 = 12,405.34 : x
  2. Step 2: Convert to fraction form
    20,723.01/31,084.35 = 12,405.34/x
  3. Step 3: Cross multiply
    20,723.01x = 31,084.35 × 12,405.34
  4. Step 4: Simplify right side
    20,723.01x = 385,611,930.43
  5. Step 5: Solve for x
    x = 385,611,930.43/20,723.01
  6. Step 6: Final answer
    x = 18,607.91

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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.