Home / 43,490.21-65,237.03-20,688.57

Finding the Fourth Proportional to 43,490.21, 65,237.03 and 20,688.57

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Solution

The fourth proportional to 43,490.21, 65,237.03 and 20,688.57 is: 31,033.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,490.21 : 65,237.03 = 20,688.57 : x
  2. Step 2: Convert to fraction form
    43,490.21/65,237.03 = 20,688.57/x
  3. Step 3: Cross multiply
    43,490.21x = 65,237.03 × 20,688.57
  4. Step 4: Simplify right side
    43,490.21x = 1,349,660,758.30
  5. Step 5: Solve for x
    x = 1,349,660,758.30/43,490.21
  6. Step 6: Final answer
    x = 31,033.67

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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.