Home / 13,815.96-20,726.40-6,428.76

Finding the Fourth Proportional to 13,815.96, 20,726.40 and 6,428.76

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Solution

The fourth proportional to 13,815.96, 20,726.40 and 6,428.76 is: 9,644.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,815.96 : 20,726.40 = 6,428.76 : x
  2. Step 2: Convert to fraction form
    13,815.96/20,726.40 = 6,428.76/x
  3. Step 3: Cross multiply
    13,815.96x = 20,726.40 × 6,428.76
  4. Step 4: Simplify right side
    13,815.96x = 133,245,051.26
  5. Step 5: Solve for x
    x = 133,245,051.26/13,815.96
  6. Step 6: Final answer
    x = 9,644.28

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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.