Home / 20,807.13-28,713.83-13,368.09

Finding the Fourth Proportional to 20,807.13, 28,713.83 and 13,368.09

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Solution

The fourth proportional to 20,807.13, 28,713.83 and 13,368.09 is: 18,447.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,807.13 : 28,713.83 = 13,368.09 : x
  2. Step 2: Convert to fraction form
    20,807.13/28,713.83 = 13,368.09/x
  3. Step 3: Cross multiply
    20,807.13x = 28,713.83 × 13,368.09
  4. Step 4: Simplify right side
    20,807.13x = 383,848,953.54
  5. Step 5: Solve for x
    x = 383,848,953.54/20,807.13
  6. Step 6: Final answer
    x = 18,447.96

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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.