Home / 20,723.51-31,085.10-12,405.84

Finding the Fourth Proportional to 20,723.51, 31,085.10 and 12,405.84

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Solution

The fourth proportional to 20,723.51, 31,085.10 and 12,405.84 is: 18,608.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,723.51 : 31,085.10 = 12,405.84 : x
  2. Step 2: Convert to fraction form
    20,723.51/31,085.10 = 12,405.84/x
  3. Step 3: Cross multiply
    20,723.51x = 31,085.10 × 12,405.84
  4. Step 4: Simplify right side
    20,723.51x = 385,636,776.98
  5. Step 5: Solve for x
    x = 385,636,776.98/20,723.51
  6. Step 6: Final answer
    x = 18,608.67

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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.