Home / 13,785.50-20,681.71-4,426.35

Finding the Fourth Proportional to 13,785.50, 20,681.71 and 4,426.35

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Solution

The fourth proportional to 13,785.50, 20,681.71 and 4,426.35 is: 6,640.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,785.50 : 20,681.71 = 4,426.35 : x
  2. Step 2: Convert to fraction form
    13,785.50/20,681.71 = 4,426.35/x
  3. Step 3: Cross multiply
    13,785.50x = 20,681.71 × 4,426.35
  4. Step 4: Simplify right side
    13,785.50x = 91,544,487.06
  5. Step 5: Solve for x
    x = 91,544,487.06/13,785.50
  6. Step 6: Final answer
    x = 6,640.64

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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.