Home / 20,666.53-28,520.40-11,713.67

Finding the Fourth Proportional to 20,666.53, 28,520.40 and 11,713.67

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Solution

The fourth proportional to 20,666.53, 28,520.40 and 11,713.67 is: 16,165.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,666.53 : 28,520.40 = 11,713.67 : x
  2. Step 2: Convert to fraction form
    20,666.53/28,520.40 = 11,713.67/x
  3. Step 3: Cross multiply
    20,666.53x = 28,520.40 × 11,713.67
  4. Step 4: Simplify right side
    20,666.53x = 334,078,553.87
  5. Step 5: Solve for x
    x = 334,078,553.87/20,666.53
  6. Step 6: Final answer
    x = 16,165.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.