Home / 13,530.91-20,313.03-6,421.93

Finding the Fourth Proportional to 13,530.91, 20,313.03 and 6,421.93

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Solution

The fourth proportional to 13,530.91, 20,313.03 and 6,421.93 is: 9,640.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,530.91 : 20,313.03 = 6,421.93 : x
  2. Step 2: Convert to fraction form
    13,530.91/20,313.03 = 6,421.93/x
  3. Step 3: Cross multiply
    13,530.91x = 20,313.03 × 6,421.93
  4. Step 4: Simplify right side
    13,530.91x = 130,448,856.75
  5. Step 5: Solve for x
    x = 130,448,856.75/13,530.91
  6. Step 6: Final answer
    x = 9,640.80

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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.