Home / 20,359.87-28,098.17-12,812.67

Finding the Fourth Proportional to 20,359.87, 28,098.17 and 12,812.67

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Solution

The fourth proportional to 20,359.87, 28,098.17 and 12,812.67 is: 17,682.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,359.87 : 28,098.17 = 12,812.67 : x
  2. Step 2: Convert to fraction form
    20,359.87/28,098.17 = 12,812.67/x
  3. Step 3: Cross multiply
    20,359.87x = 28,098.17 × 12,812.67
  4. Step 4: Simplify right side
    20,359.87x = 360,012,439.32
  5. Step 5: Solve for x
    x = 360,012,439.32/20,359.87
  6. Step 6: Final answer
    x = 17,682.46

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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.