Home / 31,875.12-47,812.68-13,147.11

Finding the Fourth Proportional to 31,875.12, 47,812.68 and 13,147.11

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Solution

The fourth proportional to 31,875.12, 47,812.68 and 13,147.11 is: 19,720.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,875.12 : 47,812.68 = 13,147.11 : x
  2. Step 2: Convert to fraction form
    31,875.12/47,812.68 = 13,147.11/x
  3. Step 3: Cross multiply
    31,875.12x = 47,812.68 × 13,147.11
  4. Step 4: Simplify right side
    31,875.12x = 628,598,563.35
  5. Step 5: Solve for x
    x = 628,598,563.35/31,875.12
  6. Step 6: Final answer
    x = 19,720.67

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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.