Home / 13,369.64-20,043.18-8,428.39

Finding the Fourth Proportional to 13,369.64, 20,043.18 and 8,428.39

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Solution

The fourth proportional to 13,369.64, 20,043.18 and 8,428.39 is: 12,635.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,369.64 : 20,043.18 = 8,428.39 : x
  2. Step 2: Convert to fraction form
    13,369.64/20,043.18 = 8,428.39/x
  3. Step 3: Cross multiply
    13,369.64x = 20,043.18 × 8,428.39
  4. Step 4: Simplify right side
    13,369.64x = 168,931,687.77
  5. Step 5: Solve for x
    x = 168,931,687.77/13,369.64
  6. Step 6: Final answer
    x = 12,635.47

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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.