Home / 13,996.98-20,989.35-7,421.67

Finding the Fourth Proportional to 13,996.98, 20,989.35 and 7,421.67

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Solution

The fourth proportional to 13,996.98, 20,989.35 and 7,421.67 is: 11,129.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,996.98 : 20,989.35 = 7,421.67 : x
  2. Step 2: Convert to fraction form
    13,996.98/20,989.35 = 7,421.67/x
  3. Step 3: Cross multiply
    13,996.98x = 20,989.35 × 7,421.67
  4. Step 4: Simplify right side
    13,996.98x = 155,776,029.21
  5. Step 5: Solve for x
    x = 155,776,029.21/13,996.98
  6. Step 6: Final answer
    x = 11,129.26

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1.5x scale

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.