Home / 13,890.65-20,835.70-3,502.13

Finding the Fourth Proportional to 13,890.65, 20,835.70 and 3,502.13

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Solution

The fourth proportional to 13,890.65, 20,835.70 and 3,502.13 is: 5,253.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,890.65 : 20,835.70 = 3,502.13 : x
  2. Step 2: Convert to fraction form
    13,890.65/20,835.70 = 3,502.13/x
  3. Step 3: Cross multiply
    13,890.65x = 20,835.70 × 3,502.13
  4. Step 4: Simplify right side
    13,890.65x = 72,969,217.11
  5. Step 5: Solve for x
    x = 72,969,217.11/13,890.65
  6. Step 6: Final answer
    x = 5,253.12

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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.