Home / 13,680.45-20,521.26-6,666.26

Finding the Fourth Proportional to 13,680.45, 20,521.26 and 6,666.26

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Solution

The fourth proportional to 13,680.45, 20,521.26 and 6,666.26 is: 9,999.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,680.45 : 20,521.26 = 6,666.26 : x
  2. Step 2: Convert to fraction form
    13,680.45/20,521.26 = 6,666.26/x
  3. Step 3: Cross multiply
    13,680.45x = 20,521.26 × 6,666.26
  4. Step 4: Simplify right side
    13,680.45x = 136,799,952.08
  5. Step 5: Solve for x
    x = 136,799,952.08/13,680.45
  6. Step 6: Final answer
    x = 9,999.67

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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.