Home / 20,706.70-28,567.96-13,540.81

Finding the Fourth Proportional to 20,706.70, 28,567.96 and 13,540.81

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Solution

The fourth proportional to 20,706.70, 28,567.96 and 13,540.81 is: 18,681.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,706.70 : 28,567.96 = 13,540.81 : x
  2. Step 2: Convert to fraction form
    20,706.70/28,567.96 = 13,540.81/x
  3. Step 3: Cross multiply
    20,706.70x = 28,567.96 × 13,540.81
  4. Step 4: Simplify right side
    20,706.70x = 386,833,318.45
  5. Step 5: Solve for x
    x = 386,833,318.45/20,706.70
  6. Step 6: Final answer
    x = 18,681.55

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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.