Home / 20,772.56-28,666-11,341.12

Finding the Fourth Proportional to 20,772.56, 28,666 and 11,341.12

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Solution

The fourth proportional to 20,772.56, 28,666 and 11,341.12 is: 15,650.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,772.56 : 28,666 = 11,341.12 : x
  2. Step 2: Convert to fraction form
    20,772.56/28,666 = 11,341.12/x
  3. Step 3: Cross multiply
    20,772.56x = 28,666 × 11,341.12
  4. Step 4: Simplify right side
    20,772.56x = 325,104,545.92
  5. Step 5: Solve for x
    x = 325,104,545.92/20,772.56
  6. Step 6: Final answer
    x = 15,650.67

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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.