Home / 10,421.40-15,625.19-5,743.65

Finding the Fourth Proportional to 10,421.40, 15,625.19 and 5,743.65

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Solution

The fourth proportional to 10,421.40, 15,625.19 and 5,743.65 is: 8,611.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,421.40 : 15,625.19 = 5,743.65 : x
  2. Step 2: Convert to fraction form
    10,421.40/15,625.19 = 5,743.65/x
  3. Step 3: Cross multiply
    10,421.40x = 15,625.19 × 5,743.65
  4. Step 4: Simplify right side
    10,421.40x = 89,745,636.90
  5. Step 5: Solve for x
    x = 89,745,636.90/10,421.40
  6. Step 6: Final answer
    x = 8,611.67

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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.